A simple bash script to test if a python syntax can work in different python versions

annotation1.py

def f(arg: int) -> None:
    pass

annotation2.py

a: int = 1
b: str = ""

annotation3.py

from typing import List

def f(arg: List[str]) -> List:
    return arg

comma.py

def f(
    aaaaaaaaaaaaaaa,
    bbbbbbbbbbbbbbb,
    ccccccccccccccc,
    ddddddddddddddd,
    eeeeeeeeeeeeeee,
    fffffffffffffff,
):
    pass


def g(
    aaaaaaaaaaaaaaa,
    bbbbbbbbbbbbbbb,
    ccccccccccccccc,
    *,
    ddddddddddddddd,
    eeeeeeeeeeeeeee,
):
    pass

output

$ bash syntax_cheker.sh annotation1.py
================================
/Users/ocavue/.pyenv/versions/3.7.0b2/bin/python3 annotation1.py
OK
================================
/Users/ocavue/.pyenv/versions/3.6.5/bin/python3 annotation1.py
OK
================================
/Users/ocavue/.pyenv/versions/3.5.5/bin/python3 annotation1.py
OK
================================
/Users/ocavue/.pyenv/versions/3.5.2/bin/python3 annotation1.py
OK
================================
/Users/ocavue/.pyenv/versions/3.4.8/bin/python3 annotation1.py
OK
================================
/Users/ocavue/.pyenv/versions/3.3.7/bin/python3 annotation1.py
OK
================================
/Users/ocavue/.pyenv/versions/3.2.6/bin/python3 annotation1.py
OK
================================
/Users/ocavue/.pyenv/versions/3.1.5/bin/python3 annotation1.py
OK
$ bash syntax_cheker.sh annotation2.py
================================
/Users/ocavue/.pyenv/versions/3.7.0b2/bin/python3 annotation2.py
OK
================================
/Users/ocavue/.pyenv/versions/3.6.5/bin/python3 annotation2.py
OK
================================
^[[A/Users/ocavue/.pyenv/versions/3.5.5/bin/python3 annotation2.py
  File "annotation2.py", line 1
    a: int = 1
     ^
SyntaxError: invalid syntax
================================
/Users/ocavue/.pyenv/versions/3.5.2/bin/python3 annotation2.py
  File "annotation2.py", line 1
    a: int = 1
     ^
SyntaxError: invalid syntax
================================
/Users/ocavue/.pyenv/versions/3.4.8/bin/python3 annotation2.py
  File "annotation2.py", line 1
    a: int = 1
     ^
SyntaxError: invalid syntax
================================
/Users/ocavue/.pyenv/versions/3.3.7/bin/python3 annotation2.py
  File "annotation2.py", line 1
    a: int = 1
     ^
SyntaxError: invalid syntax
================================
/Users/ocavue/.pyenv/versions/3.2.6/bin/python3 annotation2.py
  File "annotation2.py", line 1
    a: int = 1
     ^
SyntaxError: invalid syntax
================================
/Users/ocavue/.pyenv/versions/3.1.5/bin/python3 annotation2.py
  File "annotation2.py", line 1
    a: int = 1
     ^
SyntaxError: invalid syntax
$ bash syntax_cheker.sh annotation3.py
================================
/Users/ocavue/.pyenv/versions/3.7.0b2/bin/python3 annotation3.py
OK
================================
/Users/ocavue/.pyenv/versions/3.6.5/bin/python3 annotation3.py
OK
================================
/Users/ocavue/.pyenv/versions/3.5.5/bin/python3 annotation3.py
OK
================================
/Users/ocavue/.pyenv/versions/3.5.2/bin/python3 annotation3.py
OK
================================
/Users/ocavue/.pyenv/versions/3.4.8/bin/python3 annotation3.py
Traceback (most recent call last):
  File "annotation3.py", line 1, in <module>
    from typing import List
ImportError: No module named 'typing'
================================
/Users/ocavue/.pyenv/versions/3.3.7/bin/python3 annotation3.py
Traceback (most recent call last):
  File "annotation3.py", line 1, in <module>
    from typing import List
ImportError: No module named 'typing'
================================
/Users/ocavue/.pyenv/versions/3.2.6/bin/python3 annotation3.py
Traceback (most recent call last):
  File "annotation3.py", line 1, in <module>
    from typing import List
ImportError: No module named typing
================================
/Users/ocavue/.pyenv/versions/3.1.5/bin/python3 annotation3.py
Traceback (most recent call last):
  File "annotation3.py", line 1, in <module>
    from typing import List
ImportError: No module named typing

syntax_cheker.sh

# A simple bash script to test if a python syntax can work in different python versions
# example usage: bash synax_cheker.sh ./annotation2.py
# install pyenv before run this script: https://github.com/pyenv/pyenv-installer
# get all installed versions: pyenv versions
# get all installable versions: pyenv install --list

if [ -z "$1" ];then
    echo 'please enter .py file path'
    exit 1
fi

py_file_path=$1

for version in 3.7.0b2 3.6.5 3.5.5 3.5.2 3.4.8 3.3.7 3.2.6 3.1.5
do
    echo '================================'
    pyenv install --skip-existing $version
    pyenv local $version
    full_python_path=$(pyenv which python)
    echo $full_python_path $py_file_path
    $full_python_path $py_file_path && echo "OK"
done