問題描述

dic = {2:’bob’,3:’alice’} output = open(’/Users/Air/itchat/push.txt’,’wb’) for i in dic: print (i,dic[i]) write_str = str(i) + ’ ’ + str(dic[i]) + ’n’ print(type(write_str)) output.write(write_str)output.close()

PyCharm運行報錯如下：

2 bob<class ’str’>

Traceback (most recent call last):File '/Users/Air/itchat/test.py', line 8, in <module>

output.write(write_str)

TypeError: a bytes-like object is required, not ’str’

Process finished with exit code 1

問題解答

打開方式改成w,不要用wb。b代表二進制

用wb打開，需要encode

`dic = {2:’bob’,3:’alice’}output = open(’/Users/Air/itchat/push.txt’,’wb’)for i in dic:

print (i,dic[i])write_str = str(i) + ’ ’ + str(dic[i]) + ’n’print(type(write_str))output.write(write_str.encode())

output.close()`