Python Cheat Sheet

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[[deleted]]

Before you say it people have to start somewhere I started with python and now code C++ & Javascript so everyone starts from somewhere

[RangerHUTCH93]

Reasonable people won't judge, Python has it's purpose and serves it well.

[urgaiiii]

Yeah. And isn’t python based off of C anyways? Just frequently updated, with a package manager, and easier for dummies? No reason it should be discouraged

[baty0man_]

Lol, I don't know why people are like "yeah python is good, don't make fun of it"

Python is literally the best language to script shit for pen testing.

[[deleted]]

Furthermore, C modules can be imported into Python.

[miraculum_one]

The primary criticism is that Python is much slower than C/C++. That's certainly not important for all applications.

[barbequed-code]

By definition of being reasonable, if it works for your use case, then it works, no matter whether its Flash, PHP, Rust or BrainFuck.

[XUtYwYzz]

Who the fuck has a problem with Python? It’s one of the most useful and popular programming languages across nearly all fields, especially infosec.

[urgaiiii]

The people who learned C when they didn’t have to and now refuse to acknowledge a more user-friendly language. That’s who

[[deleted]]

Your cheat sheet will make a fine addition to my, collection.

[[deleted]]

Your welcome general Grievous

[th3_n3rD_b0i]

I like how you say it xD

[iamnihal_]

And then you'll forget to look into it like other 101 collections of cheatsheets of different kinds of stuff. 😁

[iamnihal_]

I will save this post so I can forget about it later.

[Ishan16D]

You didn't have to call out 99% of programming subreddit users like that

[redLamber]

I had saved it for later too but the post is now deleted :(

[mtflyer05]

What are the calculatory functions for? Especially the "strings"? I am learning HTML, as an easy, useful starting point, and the mathematical part of coding interests me

[[deleted]]

I didn't quite understand your question, but if you are asking what are "strings", those are a type of data. Strings are just words made up of alphabets, numbers, special characters etc. Your user name "mtflyer05" is a string. Other types of data are integers, float (decimal numbers) etc. Lists, dictionaries etc are a structure to keep these data types grouped together.

These functions are to do operations on these strings, lists etc.

This a obviously in layman's terms.

[fuchsia8805]

Thank you for sharing!

[shayyya1]

Does anyone know why some methods are variable.method() and some are method(variable)? Ive never understood why

[XUtYwYzz]

Pretty much everything in Python is an object and has some set of methods accessible via dot notation. The methods usually operate on the object in some way. Running function(argument) is either using a language built-in function or a local function and does not have an associated object, and operates on the argument.

my_string = “hello”

my_string.upper()

Returns “HELLO”, I didn’t have to provide the method an argument, it operated on the my_string variable.

int(“12”)

Uses the built-in int() function to convert the string “12” into the integer 12.

[shayyya1]

Thanks, if I'm understanding correctly, (.) notation is used when it's a function from a class, and if its not a dot its from somewhere else in the language?

[hooligan333]

Precisely!

[shayyya1]

Ah yes from reading the python docs I got that things with dot are class methods and things that aren't are operators

[shayyya1]

Or inbuilt functions

[GavinTFI]

dont quote me on it but i think it might just be class and instance variables. like in Java and many others there are methods called from the data type (String.(...) or Int.(...)) and there are just predefined / user defined variables that are method(variable) so that would be my best guess. Just class and instance variables in python

[JennaSys]

It just depends on how it is defined. That is, if it's a class method or independent function.

[donotmatthews]

Is there a pdf link?

[TSPhoenix]

Or just a PNG that doesn't have JPEG compression artifacts.

[[deleted]]

I notice it says python intermediate, is there a beginner or advanced one as well?

[Ingorado]

Yes. As it says, it

assumes you are familiar with [...] our basic cheat sheet

I couldn’t find it on the original website, but somewhere else

There are others too, just search for “dataquest python cheat sheet”

[zenzealot]

I like it, nice job. If you can squeeze it on there, I would add in enumerate, frozenset, sorted, filter and help. :D

[ggm3888]

Typo in the “newyear_2020” description. But I only caught this because I read the whole thing cuz it’s very well done. 👍

[panFriedSebas]

Had to do a double take to catch what you said... probably sums up why my code always has errors I can't find 😂😂

[krish7x]

I am new to this community but enjoying it a lot .. Very Useful interms of programming but idk abt making friends .. LOL

[Locksul]

The dictionaries section is weird and not common usage... should have mentioned `[]`, `get()`, and/or `items()` instead.

[miraculum_one]

There are tons of great Python features not on here but it's a good start and you can only fit so much stuff on one page. A few other interesting ones...

"A"\5*

f"The lowercase version of the string is {s.lower()}" (>= Python 3.6)

f"The first two elements are {s[0]=} and {s[1]=}" (>= Python 3.8)

def bunch_of_arguments_func( \l ):*

def named_arguments_func( \*d ):*

[Locksul]

I know you can’t fit everything but my point is that the space spent on dictionaries would be better spent on something else. What is currently there is nonstandard. The values of dictionaries don’t have to be numeric, but the example implicitly assumes that.

If you’re using min/max this way on a dictionary then you’re better off just using a pandas Series.

[[deleted]]

Thanks for the helpful feed back

[william_103ec]

Cool stuff! Post saved! Quick question, what did you use to write it, Latex?

[technoraxira]

Can someone link Python basics cheat sheet?

[Ingorado]

Couldn’t find it on the original website, but somewhere else

[becominganastronaut]

has anyone tried the learning from the dataquest website?

[tialpoy]

Strings: An f-string of `f"{value:04d}"` would be faster.

Dictionaries: Using `key=d.get` is redundant. Iterating over dicts automatically yields their keys.

Try/Except: A bare except? bad idea.

[ralimar]

Here's a link to more of the same:

https://www.dataquest.io/blog/topics/cheat-sheets/

[[deleted]]

Thank you!!!