如何通过python创建文本文件？

Question

我不知道这是为什么不工作

import time 

consumption = "300" 
spend = "5000" 

def create_report(consumption, spend): 

    date = time.strftime("%d/%m/%Y") 
    date = date + ".txt" 
    file = open(date, "w") 
    file.write("Since: ", pastdate) 
    file.write("Consumption in £: ", consumption) 
    file.write("Overall spend in £: ", spend) 
    file.close() 

create_report(consumption, spend) 

我希望能够简单地创建一个文本文件，并在它与今天的日期文本文件的名字写。 “w”似乎没有创建文件。我得到的错误：

file = open(date, "w") 
FileNotFoundError: [Errno 2] No such file or directory: '01/03/2016.txt' 

Answer 1

import time 

consumption = "300" 
spend = "5000" 

def create_report(consumption, spend): 
    # '/' is used for path like `C:/Program Files/bla bla` so you can't use it as a file name 
    date = time.strftime("%d_%m_%Y") 
    date = date + ".txt" 
    file = open(date, "w") 
    # NameError: name 'pastdate' is not defined 
    # file.write("Since: ", pastdate) 

    # The method `write()` was implemented to take only one string argument. So ',' is replaced by '+' 
    file.write("\n Consumption in £: " + consumption) 
    file.write("\n Overall spend in £: " + spend) 
    file.close() 

create_report(consumption, spend) 

Answer 2

你似乎操作系统，其中/是一个目录分隔上运行此。

试试这个代码，而不是：

date = time.strftime("%d%m%Y") + '.txt' 
with open(date, "w") as f: 
    f.write("Since: ", pastdate) 
    f.write("Consumption in £: ", consumption) 
    f.write("Overall spend in £: ", spend) 

注意的几件事情：

• 使用with是更好的做法，因为它保证你的文件被关闭，即使发生异常
• 使用file作为文件名是不好的做法