Pit record: typeerror:'module'object is not callable

I encountered the following error when rewriting the code today ：

TypeError: 'module' object is not callable

At first, I searched for it for a long time , The code is correct ：

pbar = tqdm(enumerate(train_loader), total=len(train_loader), desc='Train ')

It's a very simple sentence .

later debug For a long time , See reference link 【1】 It seems that I just found something , It turns out that the import method is wrong ：

import tqdm

But in fact, if you import in the above way , You need to use tqdm function ：

pbar = tqdm.tqdm(enumerate(train_loader), total=len(train_loader), desc='Train ')

But it's inconvenient to write a few more letters , Just change to the following import method ：

from tqdm import tqdm

Why? ？

If you use import tqdm Just import tqdm This module , We use the function , It just happens that the function name is the same as the module name . And this function is not the only function in this module ！

Experience

• Be standardized when importing packages ;
• The functions in the package should be standardized ！

Reference resources

【1】https://blog.csdn.net/qq_36396104/article/details/82812461