Get (detect) imports from raw python source

imports.py

import ast

exprs = [
    """
import flask
import django
a = 'hello world!'

b = __import__
b("io")
         """
]
import_names = []
[
    [import_names.extend(expr.names) for expr in _exprs]
    for _exprs in [
        list(
            filter(lambda a: type(a) in (ast.Import, ast.ImportFrom), ast.parse(e).body)
        )
        for e in exprs
    ]
]
[
    [
        import_names.extend(
            [
                [
                    str(arg.value)
                    if type(arg) == ast.Constant
                    else (arg.id if type(arg) == ast.Name else None)
                ][0]
                for arg in expr.value.args
            ]
        )
        for expr in _exprs
    ]
    for _exprs in [
        list(
            filter(
                lambda a: type(a) == ast.Expr and a.value.func.id == "__import__",
                ast.parse(e).body,
            )
        )
        for e in exprs
    ]
]

[
    print(m)
    for m in set(
        list(
            map(
                lambda e: e.name if type(e) == ast.alias else e,
                list(filter(lambda a: a is not None, import_names)),
            )
        )
    )
]