Question

我非常仓促地编写了一个程序，看看我是否可以改进我放弃的一些旧代码，因为我无法将其保存但是现在我已将它写入.csv文件它什么都不做。如果我在它运行时尝试与它进行交互，即按1,2,3,4然后没有任何反应，它甚至没有原因退出，所以我无法解决它。这是代码，谁能告诉我我缺少什么？

import pandas as pd 
import csv
import matplotlib.pyplot as plt 
import numpy as np 

myDict = {"Apples": 150, "Berries": 200, "Bananas": 300, "Oranges": 350}

def menu():
    print("Press 1: To add stock. ")
    print("Press 2: To check stock. ")
    print("press 3: To enter purchase. ")
    print("Press 4: To quit the program. ")
    return input("What would you like to do? ")

run = menu()

while True:
    if run == '1':
        AddStock = input('Product to be added to stock? ')
        Amount = int(input('Quantity of product to be added to stock? '))
        myDict[AddStock] = Amount
        run = menu()

    elif run == '2':
        for key, value in myDict.items():
            print("{}: {}".format(key, value))
        run = menu()

    elif run == '3':
        product = input('What product was sold? ')
        if product in myDict:
                myDict[product] -= 1
        else:
            print("Product is out of stock! ")
        run = menu()

    elif run == '4':
        with open('stock.csv', 'w') as stock:
            writer = csv.writer(stock)
            for key, value in myDict.items():
                writer.writerow([key, value])
                break

Answer 1

既然没有人回答这个问题......这是解决问题的快捷方法。虽然，我只会显示一次命令选项，而不是每次都显示。

import csv

myDict = {"Apples": 150, "Berries": 200, "Bananas": 300, "Oranges": 350}

def menu():
    print("Press 1: To add stock.")
    print("Press 2: To check stock.")
    print("press 3: To enter purchase.")
    print("Press 4: To quit the program.")
    return input("What would you like to do? ")

run = None
while run != '4':
    run = menu()
    if run == '1':
        AddStock = input('Product to be added to stock? ')
        Amount = int(input('Quantity of product to be added to stock? '))
        myDict[AddStock] = Amount
    elif run == '2':
        for key, value in myDict.items():
            print("{}: {}".format(key, value))

    elif run == '3':
        product = input('What product was sold? ')
        if product in myDict:
            myDict[product] -= 1
        else:
            print("Product is out of stock! ")

    elif run == '4':
        with open('stock.csv', 'w', newline="") as stock:
            writer = csv.writer(stock)
            for key, value in myDict.items():
                writer.writerow([key, value])

程序提示时，程序不执行任

1 个答案: