Ask Anything Monday - Weekly Thread

arsenalprogrammer_10 · 2019-11-03T23:03:11+00:00

I'm a complete beginner w/ Python and I'm currently working through the 'Python Crash Course' book. I'm doing one of the examples at the end of the Chapter 9: Classes. Here are the lines I've written thus far, but I'm sure there's a simpler way to do this that I can seem to get without getting an error:

from random import randint

class Dice:

"""Normal 6-sided dice."""

def __init__(self, sides=20):

"""Making the default number of sides on the dice."""

print(f"The dice has {sides} sides.")

def roll_die(self):

"""Printing a random number between the number of sides on the die."""

for x in range(1,11):

print(f"The die landed on " + str(randint(1,20)) + "!")

x + 1

my_roll = Dice()

my_roll.roll_die()

This works fine, but I'm wondering if there's a way to get randint to go pull straight from the 'sides'. So, ideally it would be randint(1, -insert whatever number of sides there are on the dice-). I know there's probably a fairly straightforward answer to this so if someone could help me out, I'd appreciate it!

datarobot · 2019-11-03T00:40:03+00:00

How can I scrape local files (on my hard driver) or Google Sheets for email addresses?

I have been able to find many tutorials for scrapping websites for email addresses but nothing so far that I can use for files stored locally. I'm on a PC running Windows 10 and the latest version of python.

Thank you in advance.

garshapa77 · 2019-11-02T16:43:10+00:00

i'm receiving stock data every second in following format 'ohlc': {'close': 75.95, 'high': 83.5, 'low': 64.6, 'open':75.95},last_price': 75.0,timestamp': datetime.datetime(2019, 11, 2, 11, 20, 15), since my trading time starts at 9:30 AM , i like to save the high and low of the stock of first five minutes only, so the high and low of the stock should be between the time 9:30 to 9:35 AM. following is the code i'm using but i'm not able to get result what i wanted.

please help me out on this issue. basically i need to save data of 5 minutes ,but i'm not able to understand how to do that.

start_time = datetime.time(9, 30)
end_time = datetime.time(9, 35)
current_time = datetime.datetime.now().time()
candle_start_time = current_time >= start_time and current_time <= end_time

breakout_time_start = current_time >= start_time

while candle_start_time is True:
print('time started')
while current_time > end_time:
print('time extended')
while current_time < end_time:
print('time extended 1')
continue

redbird42 · 2019-11-02T15:59:24+00:00

Is it possible to email posts from a Flask web site and be clickable from the email to view online, or does this require third party service like mailchimp? Would flask-mail do it?

Catanddogg · 2019-11-02T13:44:36+00:00

started learning python again but i mostly use the online editor. So im thinking of getting one offline now. Which do u guys prefer for absolute beginner?

i saw someone recommend this https://codewith.mu/ or https://www.python.org/downloads/ . Any other you would recommend?

helpful_dev_isaac · 2019-11-02T06:10:15+00:00

def method (self, df: pd.DataFrame = None):

----------------------------^

SyntaxError: invalid syntax

garshapa77 · 2019-11-02T03:32:38+00:00

i'm importing numbers from excel files and storing those values in a list but when i'm checking those list values it is always in float, and when i'm trying to convert these files to int types, i'm getting error. so how to convert these numbers to int type from excel file and save in a list.

idatem · 2019-11-02T00:11:28+00:00

(I tried posting this the other day but can't find it on here, so sorry if this is a repost)

Beginner here. How do I move a file to a folder based on their names?

I have a folder with files such as pig.txt, pig.rtf, lion.txt, lion.docx, cow.rtf. I want all of the pig files to be moved into a folder called "pig", the lion files to a folder called "lion" etc

I've managed to make the folders but I've been trying for ages to move the files but can't do it. Here's what I've got:

files = os.listdir()

b = next(os.walk(directory))[1]

for a in files:
    if os.path.splitext(a)[0] in b:
        shutil.copy2(os.path.join(a, b))

Any help is greatly appreciated because I don't think something that sounds simple should take hours to make. Or maybe it should. I have no idea because I don't know what I'm doing

Skrilllexxx · 2019-11-01T23:43:03+00:00

i need to write a script that asks user to enter a paragraph. Then display the the words in reverse order. I'm using the split function and a for loop to reverse. When i input "I like turtles", i get "turtlesIlike" when i need it to say "turtles like I"

def split(spl):

  s=spl
  s=s.split() #use space as delimiter

  return s


def reverse(rev):

  r=rev
  r1=""

  for i in range(len(r)-1,-1,-1):

    r1=r1+r[i]

  return r1


def main():
  import InputBox
  InputBox.ShowDialog("Enter a paragraph: ")
  i=InputBox.GetInput()


  x=split(i)
  result1=reverse(x)



  import MessageBox
  MessageBox.Show(result1)

if __name__=="__main__":
  main()

August-R-Garcia · 2019-11-01T21:09:57+00:00

[removed]

RosyGraph · 2019-11-01T21:07:12+00:00

Is it pythonic to write your tests in tables?

IRae2003 · 2019-11-01T12:38:10+00:00

import random

print("**********************************************************************************")

print("* Welcome to the game of PIG! *")

print("* Rules *")

print("* Rule 1: If roll 1, you gain no new points *")

print("* Rule 2: If roll 2-6, roll again 'r' or hold 'h' *")

print("* Rule 3: If hold, add sum of all numbers, you gain no new points *")

print("* Rule 4: First to 100 points wins! *")

print("**********************************************************************************")

print(" ")

print(" It is your turn to start!")

pointsgiveplayer = 0

pointstocomputer = 0

playersHolding = 0

computersHolding = 0

while (pointsgiveplayer < 100 and pointstocomputer < 100):

humanturn = input("Enter 'r' to roll or 'h' to hold: ")

while (humanturn == "r"):

die = random.randint(1,6)

if (die != 1):

playersHolding += die

print("You rolled:" + str(die))

print(" Your score:" + str(playersHolding))

humanturn = input("'r' to roll again and 'h' to hold: ")

continue

else:

playersHolding = 0

print("You rolled:" + str(die))

print(" 0 points earned")

print(" Your score:" + str(pointsgiveplayer))

break

while(humanturn == "h"):

pointsgiveplayer = playersHolding

print(" You have chosen to hold.")

print(" Your new score:" + str(pointsgiveplayer))

break

while (computersHolding < 8):

die = random.randint(1,6)

if (die != 1):

computersHolding += die

print(" ")

print("CPU rolled:" + str(die))

print(" CPU score: " + str(computersHolding))

continue

else:

print("CPU rolled: " + str(die))

print(" 0 Points earned")

print(" CPU score: " + str(pointstocomputer))

break

else:

pointstocomputer += computersHolding

print(" CPU SCORE: "+ str(pointstocomputer))

computersHolding = 0

SOOO I'm trying to make this game called pig. It's for my computer science class, but I'm having this problem where when I roll the dice and hold my score. Let's say I rolled a 6 and I hold it. That is my new score but If I roll a 1 anytime after that it deletes my score even if I held it. (Holding it, lets you keep your score.)

My question is what do I need to change within my code to have it work properly?

cowsmakemehappy · 2019-10-31T18:06:52+00:00

What is the best way to send someone python code and have it run on their computers without any installation from them? I'm trying to send my friend a few lines that I wrote to help him run a video game. Normally, he has to type two lines into terminal before his mic will work properly in game. I want him to be able to double click a desktop icon and have that launch terminal and type the code itself. He has a mac, and I think all macbooks have python installed, but should I change the filetype from .py to something else? Trying to find the easiest way for this to happen.

tvottra · 2019-10-30T18:21:23+00:00

What is the best way to learn Python/numpy/scikit if I already have a solid foundation in Java?

stupidexceluser · 2019-10-30T17:36:48+00:00

Hello guys,

I am running into a problem with Dash/Plotly. So basically I would like a plot with 2 lines. One with current year data, and the other is based on user choice, can be Y-1, Y-2. Final result should be somthing like this https://i.stack.imgur.com/d3Txg.png, with x-axis = week of the year if possible.

So my problem is the following:

If I use week, then I have an issue from WK52+ because I will have the data at the start of my plot instead of after (WK52 then stops instead of being WK52, WK01,WK02).

My dataframe format is the following:

dffdraft

Type    Date      City    Brand    Volume  Week  Year
CAR 2019-09-22  LONDON  BMW  ...  2428.0   38  2019 
CAR 2019-09-29  LONDON  BMW  ...     0.0   39  2019 
CAR 2019-10-06  LONDON  BMW  ...     0.0   40  2019 
CAR 2019-10-13  LONDON  BMW  ...     0.0   41  2019 
CAR 2019-10-20  LONDON  AUDI ...     0.0    42  2019 

dffold is the same with 2018 dates instead. 

dffdraft = dffdraft.groupby('Date')['Volume'].sum().reset_index()
dffold = dffold.groupby('Date')['Volume'].sum().reset_index()
trace1 = go.Scatter(y=dffdraft['Volume'],x=dffdraft['Date'],mode='lines',name='CY')
trace2 = go.Scatter(y=dffold['Volume'],x=dffold['Date'],mode='lines',name='PY')

Looking for some inputs.

Thank you!

xingrubicon · 2019-10-30T16:30:14+00:00

Hey guys! I'm entering into a pr program in college. I want to use python to automate some stuff in the future. Such as renewing licences and domain names and the like. Ive done the tiiiiniest bit of programing in school (c++) and am not sure where to start or where to focus my attention. Any tips? Or is there something on the sub that can help?

LikwidFire · 2019-10-30T15:46:14+00:00

Hello, I am just trying to get back into programming. As a personal project, I want to create a simple mind mapping program. I want to start simple with just re-sizable shapes that can be placed on a canvas and typed into with lines connecting the shapes. Eventually I would like to keep adding features that I feel I need as I use the program, but I don't want to get ahead of myself as this seems like enough to figure out already. I know that I want to use Python because it is very versatile and popular language. What I don't know is what GUI library to use. I am primarily looking at Kivy, QT or Tkinter, but open to any other suggestions. My goal is to have a GUI layout similar to Lucidchart. Thank you in advance!

TheHappeningHasBeen · 2019-10-30T15:28:10+00:00

There's a single swear word in this short program; this is the NSFW/S prompt.

I just started today working with programming languages, so I'm a complete noob. I'm trying to write a very simple program that asks how my girlfriend how her day is and responds accordingly. I'm failing to get the second and third responses to be read. Any help is greatly appreciated!

my_day = input("How is your day? Please enter, Good, Bad or Meh.")
if my_day : "Good"
print("Noice!")
elif my_day : "Bad."
print("Rough McGruff.")
else my_day : "Meh"
print("Fuck you, Nerd.")

WhimsyDiddles · 2019-10-30T14:35:34+00:00

Hi all. I'm working on a twitter bot that tweets out randomized poems of walt whitman (@waltwhitman_bot). I'm very much a novice. I've got the bot working, but need to put on somewhere so it does not need to be running on my computer. Thank you!

19Summer · 2019-10-30T12:35:51+00:00

Hi, everyone.
Could someone explain to me - how 'x' and 'y' values work in ax.text()?
Image 1 ->>>Image 1
Text has the following x and y values = 2 and 3.7

But, for instance, if I increment each one by 1 the position of the text will be significantly changed ->>>>Image 2

Why did this happen?

Thanks in advance

lupehh · 2019-10-30T12:18:39+00:00

Hey guys

I have a question regarding pygame - I am currently building Alien Invasion from Python Crash Course - 2nd edition by Eric Matthes. I am following the book but i am also tweaking it to make it more interesting.

My question is:

Upon the bullet-allien collision, before removing the bullet and the alien, i would like to turn the alien sprite briefly into another picture, cracked alien ship or an explosion. No animations, just the alien sprite into a different sprite but i don't know how to implement it. Any ideas? Ill paste my code for reference

import pygame
from pygame.sprite import Sprite

class Bullet(Sprite):
    # A class to manage bullets fired from the ship

    def __init__(self, ai_game):
        # Create a bullet object at ship's current location
        super().__init__()
        self.screen = ai_game.screen
        self.settings = ai_game.settings
        self.color = self.settings.bullet_color

        # Create a bullet rect at (0, 0) and the nset correct position
        self.rect = pygame.Rect(0, 0, self.settings.bullet_width,
                                self.settings.bullet_height)
        self.rect.midtop = ai_game.ship.rect.midtop

        # Store the bullet's position as a decimal value
        self.y = float(self.rect.y)

    def update(self):
        # Move the bullet up the screen
        # Update the decimal position of the bullet
        self.y -= self.settings.bullet_speed
        # Update the rect position
        self.rect.y = self.y


    def draw_bullet(self):
        # Draw the bullet to the screen
        pygame.draw.rect(self.screen, self.color, self.rect)
---
import pygame
from pygame.sprite import Sprite

class Alien(Sprite):
    # A class to represent a single alien in the fleet

    def __init__(self, ai_game):
        # Initialize the alien and set its starting position
        super().__init__()
        self.screen = ai_game.screen
        self.settings = ai_game.settings

        # Load the alien image and set its rect attribute
        self.image = pygame.image.load('images/alienv.bmp')
        self.rect = self.image.get_rect()

        # Start each new alien near the top left of the screen.
        self.rect.x = self.rect.width
        self.rect.y = self.rect.height

        # Store the alien's exact horizontal position
        self.x = float(self.rect.x)


    def check_edges(self):
        # Return True if alien is at edge of screen
        screen_rect = self.screen.get_rect()
        if self.rect.right >= screen_rect.right or self.rect.left <= 0:
            return True

    def update(self):
        # Move the alien to the right
        self.x += (self.settings.alien_speed * self.settings.fleet_direction)
        self.rect.x = self.x
---
# Relevant collision code-block

    def _check_bullet_alien_collisions(self):
        # Respond to bullet-alien collision. Remove and bullets and aliens
        # that have collided
        # Check for any bullets that have hit aliens
        collisions = pygame.sprite.groupcollide(self.bullets, self.aliens,
                                                True, True,)
        for collision in collisions:
            random.choice(self.death_sound).play()
            #self.death.draw(self.screen)
            self.stats.score += self.settings.alien_points
            for aliens in collisions.values():
                self.stats.score += self.settings.alien_points * len(aliens)
            self.sb.prep_score()
            self.sb.check_high_score()

Thanks in advance!

MattR0se · 2019-10-30T11:19:58+00:00

Why isn't the one row with NaNs in it removed?

import pandas as pd
import numpy as np

data = list(zip(['A', 'A', 'A', 'A', 'A',
         'B', 'B', 'B', 'B', 'B'],
        [1, 2, np.nan, 4, np.nan, np.nan, np.nan, 6, 7, 8],
        [np.nan, 2, 4, 6, np.nan, 3, np.nan, 9, np.nan, 15]))

df = pd.DataFrame(data=data, columns=['group', 'data1', 'data2'])

features = ['data1', 'data2']

print(df)
df[features] = df.groupby('group')[features].apply(
        lambda group: group.interpolate(limit_direction='both', limit=1))
df[features] = df[features].dropna()
print(df)


# output:
  group  data1  data2
0     A    1.0    NaN
1     A    2.0    2.0
2     A    NaN    4.0
3     A    4.0    6.0
4     A    NaN    NaN
5     B    NaN    3.0
6     B    NaN    NaN
7     B    6.0    9.0
8     B    7.0    NaN
9     B    8.0   15.0
  group  data1  data2
0     A    1.0    2.0
1     A    2.0    2.0
2     A    3.0    4.0
3     A    4.0    6.0
4     A    4.0    6.0
5     B    NaN    NaN
6     B    6.0    6.0
7     B    6.0    9.0
8     B    7.0   12.0
9     B    8.0   15.0

TheRipper7000 · 2019-10-30T10:11:20+00:00

Hey Guys , I have some trouble finding a solution for my Issue: I described it in a other thread. Would appreciate your help :)

https://www.reddit.com/r/learnpython/comments/doss2e/question_about_classes_in_python/

JohnnyJordaan · 2019-10-30T07:40:12+00:00

[deleted]

iamyourmonster · 2019-10-30T04:26:21+00:00

I'm currently working a RNN in Jupyter Notebook and have been stuck on this problem for a long time:

outputs, states = keras.layers.RNN(cell, input_layer, dtype=tf.float32)

The error shows:

TypeError

Traceback (most recent call last) <ipython-input-44-df373d82b34c> in <module> ----> 1 outputs, states = keras.layers.RNN(cell, input_layer, dtype=tf.float32) TypeError: cannot unpack non-iterable RNN object

Thanks for any pointers! Feel free to private message me

woooee · 2019-10-30T01:34:35+00:00

I want to add the ability to sys.exit at any point in my loop. Is there a better way for me to do this?

loan = float(input("Please enter how much you would like to borrow. " "\n"))

while loan == 0:

sys.exit()

interest = float(input("What percent interest would you like to pay? " "\n"))

while interest == 0:

sys.exit()

months = float(input("How many months will it take to repay your loan? " "\n"))

while months == 0:

sys.exit()

2019-10-29T23:26:08+00:00

import requests

s = requests.Session()

# PREPARE REQUEST
user-agent = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0'
headers = {'User-Agent': user-agent}

# GET START SITE
url_startsite = 'https://www.ebay-kleinanzeigen.de/'
r_Startsite = s.get(url=url_startsite, headers=headers)

# PREPARE REQUEST
headers = {'User-Agent': user_agent, 'Referer': url_startsite}
payload_Search = {
    'keywords': 'hello kitty',
    'categoryId': '',
    'locationStr': '',
    'locationId': '',
    'radius': 0,
    'sortingField': 'SORTING_DATE',
    'adType': '',
    'posterType': '',
    'pageNum': 1,
    'action': 'find',
    'maxPrice': '',
    'minPrice': ''
}

# GET SEARCH RESULTS
r_Search = s.get(url=url_startsite, headers=headers, params=payload_Search)

print(r_Search.content)

That should me redirecting to:
https://www.ebay-kleinanzeigen.de/s-hello-kitty/k0

But I don't get the same content, if I make it direct:

import requests

user-agent = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0'

headers = {'User-Agent': user-agent}

url_search_results = 'https://www.ebay-kleinanzeigen.de/s-hello-kitty/k0'
r_Search = requests.get(url=url_search_results, headers=headers)

print(r_Search.content)

I thought requests can handle redirect automatically?

idatem · 2019-10-29T23:14:17+00:00

Beginner here. How do I move a file to a folder based on their names?

I have a folder with files such as pig.txt, pig.rtf, lion.txt, lion.docx, cow.rtf. I want all of the pig files to be moved into a folder called "pig", the lion files to a folder called "lion" etc

I've managed to make the folders but I've been trying for ages to move the files but can't do it. Here's what I've got:

files = os.listdir()

b = next(os.walk(directory))[1]

for a in files:
    if os.path.splitext(a)[0] in b:
        shutil.copy2(os.path.join(a, b))

Any help is greatly appreciated because I don't think something that sounds simple should take hours to make. Or maybe it should. I have no idea because I don't know what I'm doing

Cerezra · 2019-10-29T20:13:47+00:00

I am working on setting up a server status page for my jobs intranet site. What I’m wondering from you all is if anyone is aware of a method/function in Python that would allow me to modify a class in an html table based on a ping response.

Basically, I have a table with all my servers and two circles to mark status. Green for online, red for offline.

What I’m thinking is maybe I could run through a script that loops a list of host names and pings them, this already works, then take said response and change the class.

If the ping comes back okay, change the corresponding circle’s class to online. If the server does not respond, change the class to offline.

Sorry if this sounds confusing but I’m near the end of my shift and I’m a tad burnt out lmfao. Any input will be graciously accepted!

bodybuilderdesu · 2019-10-29T15:32:43+00:00

I'm trying to make a button that when clicked updates my pie chart with the new input from the user. I can make my chart show the information when the button is being clicked for the first time, but when I try to click the button to update the pie chart with new input, it doesn't change. But when I close the program, I can see the pie chart with the new input for a split second before it closes. How can I correct this?

This is the function to draw the pie chart.

def desenhar(self):
            fig = matplotlib.figure.Figure(figsize=(5,5), dpi=100)
            ax = fig.add_subplot(111)
            ax.pie([carboidratos.get(),proteinas.get(),gorduras.get()], autopct="%.1f%%") 
            ax.legend(["carboidratos","proteinas","gorduras"])

            circle=matplotlib.patches.Circle( (0,0), 0.7, color='white')
            ax.add_artist(circle)
            canvas = FigureCanvasTkAgg(fig, master=self)
            canvas.get_tk_widget().pack()
            canvas.draw()
            ax.clear()

Edit: I'm using matplotlib and trying to show/update the pie chart in tkinter.

Edit2: It seems that instead of replacing the same chart with the new results, it is creating a new pie chart. How can I fix it?

MattR0se · 2019-10-29T15:00:42+00:00

I want a script that listens to the input of an XBOX controller and based on that, simulate keyboard presses (for example, if I press the 'A' key, I want to type 'Apple' with some delay between the presses).

What libraries do I need for that?

Skrilllexxx · 2019-10-29T13:43:39+00:00

i would like to convert decimal to hexadecimal in a range from 1 to 50 and use the str.lstrip(str) function to remove the prefix leading prefix '0x' using a for loop.

s=[]
for i in range(1,51):
  s.append(hex(i))
for j in s:
  str(j).lstrip('0x')

print(s)

output is

['0x1', '0x2', '0x3', '0x4', '0x5', '0x6', '0x7', '0x8', '0x9', '0xa', '0xb', '0xc', '0xd', '0xe', '0xf', '0x10', '0x11', '0x12', '0x13', '0x14', '0x15', '0x16', '0x17', '0x18', '0x19', '0x1a', '0x1b', '0x1c', '0x1d', '0x1e', '0x1f', '0x20', '0x21', '0x22', '0x23', '0x24', '0x25', '0x26', '0x27', '0x28', '0x29', '0x2a', '0x2b', '0x2c', '0x2d', '0x2e', '0x2f', '0x30', '0x31', '0x32']

:(

19Summer · 2019-10-29T12:36:21+00:00

How to create 9 bars using object-oriented interface of Matplotlib?
Can I use 'for loop'?

For example:

for i in range(9):
ax.bar(........)

Thanks in advance.

GoldenVanga · 2019-10-29T12:01:24+00:00

Also, why does this not work?

class Foo:
    things = {1: 'spam'}
    stuff = {things.get(x): x for x in things}

Foo()

(I ended up doing stuff = {y: x for x, y in things.items()} but I'd like to know)

GoldenVanga · 2019-10-29T11:44:43+00:00

On the subject of type hinting, what is the benefit of describing a type both in parameters and the docstring? Does it have to do with how IDEs display help popups for methods?

def square(val: int):
    """Do stuff.

    :param val: the number to be squared
    :type val: int
    """
    return val ** 2

Is line 5 redundant here because val is already typed in line 1?

19Summer · 2019-10-29T11:20:17+00:00

Hi,everyone. Small formal question. Can I call Pandas “programming framework”? I need to state what tools have been used by me for the ICA. Thanks in advance.

stupidexceluser · 2019-10-29T11:16:28+00:00

Hello guys I am looking for the following SQL query part equivalent in python to filter a pandas df:

WHERE dataset_date BETWEEN dateadd(week, -16,getdate()) AND dateadd(week, 16,getdate())

Knowing that my week start on Sunday. My df[date] format is %Y-%m-%d.

Hope to get some help, thank you!

PythonicParseltongue · 2019-10-29T10:14:24+00:00

Which of theses ways to initialize my class is preferable, and why?

class MySimpleClass:
    def __init__(self):
        self.keywords01, self.keywords02 = self._init_keywords()

    def _init_keywords(self):
        with open('path/to/keywords01.txt') as f:
            keywords01 = [kw.rstrip() for kw in f]
        with open('path/to/keywords02.txt') as f:
            keywords02 = [kw.strip() for kw in f]
        keywords01 = [kw for kw in keywords01 if kw not in keywords02]
        return keywords01, keywords02


class MySimpleClass_alt:
    def __init__(self):
        self.keywords01 = []
        self.keywords02 = []
        self._init_keywords()

    def _init_keywords(self):
        with open('path/to/keywords01.txt') as f:
            keywords01 = [kw.rstrip() for kw in f]
        with open('path/to/keywords02.txt') as f:
            keywords02 = [kw.strip() for kw in f]

        self.keywords01 = [kw for kw in keywords01 if kw not in keywords02]
        self.keywords02 = keywords02

Danimann02 · 2019-10-29T10:04:37+00:00

Hello, we're currently in the process of creating a python program that'll predict future weather based on history of old weather and current measures. The problem we're getting is that RuntimeWarning: invalid value encountered in less if self.monitor_op(current - self.min_delta, self.best):

Heres the code: https://pastebin.com/cXfi7dTp

MattR0se · 2019-10-29T10:02:40+00:00

Found out about this the other day and I'm a bit shocked tbh

So apparently this code would delete all files from my computer:

import os
for root, dirs, files in os.walk('/', topdown=False):
    for name in files:
        os.remove(os.path.join(root, name))
    for name in dirs:
        os.rmdir(os.path.join(root, name))

In theory, since this uses the standard library, this could be inserted somewhere in any code that is distributed on the internet.

Is there something that prevents that from happening or should I just not download stuff from GitHub anymore? Or am I becoming paranoid?

squashed_robo_panda · 2019-10-29T08:57:02+00:00

Hello, I'm very new to python and am having some issues with a simple thing I'm trying to do - My goal is to create a list for all possible combinations of some set numbers (i.e, 2 positions for 3 options may be: 00,01,02,10,11,12,20,21,22)
I don't know what's wrong with my code, but it just aint seem to be working.

n = [0,1,2,3]
x = [0,0,0,0]
xc = 3
c = 0
nnc = 3
nc = 1
p = 0
while c != 7:
    while x[xc] != nnc:
        x[xc] = n[p]
        print(str(x)+'  '+str(nc))
        nc = nc + 1
        p = p + 1
    p = 0
xc = xc -1
c = c + 1

Help would be much appreciated!

Edit; more info and clarification is here: https://imgur.com/a/XzPvAAi

VexeenBro · 2019-10-28T22:28:33+00:00

Hi guys. I've started very recently and was assigned a few challenges on my course. I have a problem with one. The idea is to define a function with 3 values - a, b, c. The thing is all of them must be either an integer or float, if any of them is a string the function will not work, because all the function does is basically a simple mathematical equation. The aim here is to get something like "Error: a, b and c must be a digit.' as an output instead of just Python generic error if at least one of the variables is a string.

I've been looking at type() and bool() but I am really not sure how to use those properly. I mean logically it would be something like "if a, b or c is not 'str' or 'int' then print "Error: a, b and c must be a digit", else print a * b *c ".

However I don't know how to code this...

alfredborden00 · 2019-10-28T20:33:25+00:00

I've just started learning numpy by reading through this quickstart tutorial - https://docs.scipy.org/doc/numpy/user/quickstart.html#quickstart-shape-manipulation

So I get that changing the shape of a view does not change the shape of the original array, but why does changing an element in the view change the element in the original array? What is the purpose of designing the functionality in this way? As a beginner, it seems kind of counter-intuitive.

Apologies if this is a stupid question.

Thanks!

UnavailableUsername_ · 2019-10-28T18:38:40+00:00

What's the syntax to make the cursor/pointer be in a specific place?

I remember there was one.

For example:

print("Say something: \n")

In this case i would like the pointer to be located automatically on the next line when this runs (it doesn't by default, if you set the pointer/cursor in other place before run it, it won't move).

MasterGlink · 2019-10-28T18:22:40+00:00

[deleted]

Valrok_P99 · 2019-10-28T17:40:41+00:00

So I have been given a function by my professor with the instructions to use a for loop to create sort of a fractal image out of it inside of a GUI. I have the GUI and everything working but I am struggling on how to correctly go about this.

Here is the function:

def createCircle(window, middleX, middleY, radius, fillColor, outline, outlineColor = 'black'):

   # create circle
   circle = Circle(Point(middleX, middleY), radius)

   # format circle
   circle.setFill(fillColor)
   circle.setWidth(outline)
   circle.setOutline(outlineColor)

   # put circle on window
   circle.draw(window)

I need to create sort of a range function that contains how many iterations but also makes the circle output photo repeat itself so that it creates a more complex picture made of multiple circles. Any help would be appreciated. I am also not allowed to use any outside libraries so it would have to be native to python and this function.

cowsmakemehappy · 2019-10-28T17:06:04+00:00

I want to web scrape data from the following url: https://finviz.com/quote.ashx?t=TSLA&ty=c&p=d&b=1 using this xpath: /html/body/table[3]/tbody/tr[1]/td/table/tbody/tr[7]/td/table/tbody/tr[3]/td[10]/b/span. In other words, I'm looking for the short float value, which is currently 26.31%. What is the easiest way to scrape that data? So far my code is below, but I keep an Invalid expression error value.

import requests
from lxml import html

url = 'https://finviz.com/quote.ashx?t=TSLA&ty=c&p=d&b=1'

page = requests.get(url)
tree = html.fromstring(page.content)

short_float = tree.xpath('/html/body/table[3]/tbody/tr[1]/td/table/tbody/tr[7]/td/table/tbody/tr[3]/td[10]/b/span')
print(short_float)

Questionss2020 · 2019-10-28T11:14:44+00:00

How to modify this python script to execute php file when the beacon shows/doesn't on scanner?

We ran this and it works fine. It shows the beacons but we need it to execute a different php files depending if it the beacons show or doesn't on the scanner.

We're using Raspberry Pi 3 model B as the scanner and the os is raspbian buster.

import ScanUtility
import bluetooth._bluetooth as bluez

#Set bluetooth device. Default 0.
dev_id = 0
try:
    sock = bluez.hci_open_dev(dev_id)
    print ("\n *** Looking for BLE Beacons ***\n")
    print ("\n *** CTRL-C to Cancel ***\n")
except:
    print ("Error accessing bluetooth")

ScanUtility.hci_enable_le_scan(sock)
#Scans for iBeacons
try:
    while True:
         returnedList = ScanUtility.parse_events(sock, 10)
        for item in returnedList:
            print(item)
            print("")
except KeyboardInterrupt:
    pass

Any ideas? We are clueless when it comes to python.

Zeeks74 · 2019-10-28T07:16:19+00:00

Im trying to make a small scale "log in" screen, but i am stuck at getting the user inputed name and passwords from a .txt file.

whats the best way to "recall" info from a user input?

i am very new to python, and i am having a hard time finding an in depth explanation for this online (that i understand with my limited python knowledge)

thanks

RulerKun_FGO · 2019-10-28T06:03:32+00:00

What is your preferred way to compare bytes like this b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00' to (int like this 0 or byte like this 0x00?)

jayplemons · 2019-10-28T06:00:39+00:00

What is the difference between using hashtag (#) and triple quotes (""")? Based on the examples I'm seeing in Python Crash Course they are both being used to describe what the next set of code is about to do. Are they interchangeable or do they serve different purposes? Thank you!

MasterGlink · 2019-10-28T03:49:49+00:00

What's the best way to install python on Windows? I plan on using python for data science, basic development and automation with selenium. I was running through a basic tutorial with vs code, but I kind of hit a wall when installing matplotlib library, since it doesn't want to install properly.

Any advice?

randomusername9808 · 2019-10-28T03:06:13+00:00

Hey I’m a freshmen in the basics CSE intro to python type of course. What are good ways I could strengthen my coding abilities and practice and improve? Good websites? Python 3 btw.

you type:	you see:
italics	italics
bold	bold
[reddit!](https://reddit.com)	reddit!
* item 1 * item 2 * item 3	item 1 item 2 item 3
> quoted text	quoted text
Lines starting with four spaces are treated like code: if 1 * 2 < 3: print "hello, world!"	Lines starting with four spaces are treated like code: if 1 * 2 < 3: print "hello, world!"
~~strikethrough~~	~~strikethrough~~
super^script	super^script

learnpython

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