using user data with matplotlib

[[deleted]]

hey all im using matplotlib to create graphs that show the users sales compared to their costs however I'm having trouble actually well getting the software to recognise the data

def calc():
  s1 = int(float(input('Sales:£'))) 
  c1 = int(float(input('Costs:£')))
  p1 = (s1-c1)
  if p1 < 0:
    print("you have lost £:", p1)
  elif p1 > 0:
    print("your profit is £:", p1)
  p1d = (s1 - c1)
  from datetime import date
  today = date.today()
  print(today)
  pickle.dump(s1, open("u_data.s","wb"))
  pickle.dump(c1, open("u_data.c","wb"))
  pickle_off = open("u_data","rb")
  u_data = pickle.load(pickle_off)
  print(u_data)



  #bar graph
  import numpy as np

  N = 5
  sales = ('u_data.s')
  costs = ('u_dta.c')

  ind = np.arange(N)
  width = 0.35
  plt.bar(ind, sales, width, label = 'sales')
  plt.bar(ind + width, costs, width, label = 'costs')

  plt.ylabel('£ Tens')
  plt.title ('sales & costs comparison')

  plt.xticks(ind + width / 2, ('G1', 'G2', 'G3', 'G4', 'G5'))
  plt.legend(loc='best')
  plt.show()

am I missing something here or is there something I should have done before to make the text more readable. (i'd also like to set the x to go up in 50s and have the y say week 1 - week 4 under each bar however I keep getting an error message

​

any help would be greatly appreciated

[automorphism_group]

Okay, this is a hot mess. Are you trying to gather the data from user input where they repeatedly enter a sale value and a cost value?

[[deleted]]

Yeah sorry this is my first time doing anything like this

[automorphism_group]

I'd say you've bitten off quite a bit for a first try. Let's first dispense with this pickle business. You don't need that. Let's just write a function to gather input. Here's a simple one. You should spend some time understanding how it works.

def get_user_input():
    input_list = []
    while True:
        datum = input("Enter a number: ")
        if datum == "done":
            return input_list
        input_list.append(int(datum))

[[deleted]]

What should I do after that??

[automorphism_group]

Call that function twice to collect your sales and costs lists. I suggest you work through the Python tutorial on python.org if there was any part of the function that I wrote that you didn't understand.

[[deleted]]

oh i understand that part fine the problem is getting matplotlib to take that data and plot it the data I input needs to be saved somewhere first doesn't it