泡菜错误-需要整数

Question

with open('data', 'w') as f:
    pickle.dumps({'foo':111},f)

results in

an integer is required (got type _io.TextIOWrapper)

How can I fix this?

I am pretty sure An integer is required? open() was not called beforehand. Python version is 3.6.2

Answer 1

pickle.dumps dumps obj into a string which it returns. In order to write into a file, you probably want to use pickle.dump (without the s).

with open('data', 'wb') as f:
    pickle.dump({'foo':111}, f)

Additionally you should also open the file in binary mode, because pickle.dump will write binary data.