試圖寫入一個文件，但我得到一個錯誤，說寫需要一個文件對象而不是一個字符串

Question

感謝所有的反饋，現在錯誤已修復。

我想用這段代碼寫入一個文件。

import datetime 
from datetime import datetime 
ctime = str(datetime.now()) 
try: 
    open("pyth_log.txt", "w") 
    file.write("pyth_log.txt") 
    file.write("-------") 
    file.write("LOG") 
    file.write(ctime) 
    file.write("-------") 
    file.close() 
except: 
    print("Unable to open file") 
    raise 

錯誤，我得到：

TypeError: descriptor 'write' requires a 'file' object but received a 'str' 

我也試圖與 「pyth_log.txt」 不加引號，但隨後給我的錯誤運行代碼：

NameError: name 'pyth_log' is not defined 

Answer 1

您錯過了將文件指針分配給文件變量 試試這個

from datetime import datetime 
ctime = str(datetime.now()) 
try: 
    with open("pyth_log.txt", "w") as file: 
     file.write("pyth_log.txt") 
     file.write("-------") 
     file.write("LOG") 
     file.write(ctime) 
     file.write("-------") 
except: 
    print("Unable to open file") 

Answer 2

爲了使用write()方法，您必須與文件對象一起使用。此外，最好是使用with open()語法上調用close()的範圍將被丟棄時with結束：

import datetime 
from datetime import datetime 
ctime = str(datetime.now()) 
try: 
    with open("pyth_log.txt", 'w') as f: 
     file.write("pyth_log.txt\n" 
        "-------\n" 
        "LOG\n" 
        + ctime + "\n" 
        "-------") 
except: 
    print("Unable to open file") 
    raise 

Answer 3

from datetime import datetime 

ctime = str(datetime.now()) 
try: 
    with open("pyth_log.txt", "w") as file: 
     file.write("-------\n") 
     file.write("LOG\n") 
     file.write(ctime) 
     file.write("\n-------\n") 
except: 
    print("Unable to open file") 
    raise