我在git的根目录下面新建了一个.gitignore文件，然后添加了以下的内容

# Byte-compiled / optimized / DLL files__pycache__/
*.py[cod]

但是如果我现在修改了一个.py文件，编译后用git status查看

Changes not staged for commit:
(use "git add ..." to update what will be committed)
(use "git checkout -- ..." to discard changes in working directory)

modified: views.py
modified: views.pycno changes added to commit (use "git add" and/or "git commit -a")

请问应该怎么解决这个问题，让git忽视.pyc文件的修改