Python_異常：TypeError: write() argument must be str, not list

文件寫入操作時，報錯：TypeError: write() argument must be str, not list

原因：python寫入的內容要是字符串類型的

上代碼：

fp = open("a.txt","w")
fp.write([1,2,3])
fp.close()

>>> fp = open("a.txt","w")
>>> fp.write([1,2,3])
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: write() argument must be str, not list
>>> fp.close()

寫入內容為字符串類型則ok

fp = open("a.txt","w")
fp.write('[1,2,3]')#將文件內容處理為字符串類型
fp.close()