分析并输出Python代码依赖的库的实现代码

用法:
分析一个脚本的依赖: analysis_dependency.py script1.py
递归分析依赖: analysis_dependency.py script1.py -r

#!/usr/bin/env python
# encoding: utf-8
# source: https://github.com/MrLYC/ycyc/blob/dev/tools/analysis_dependency.py

import ast
import importlib
import inspect

class Analysis(ast.NodeTransformer):
def __init__(self, paths, recursion):
self.modules = list()
self.paths = list(paths)
self.recursion = recursion

def add_module(self, module):
if module and module not in self.modules:
self.modules.append(module)
if self.recursion:
try:
path = inspect.getsourcefile(importlib.import_module(module))
if path:
self.paths.append(path)
except:
pass

def visit_Import(self, node):
for i in node.names:
self.add_module(i.name)

def visit_ImportFrom(self, node):
self.add_module(node.module)

def analysis(self):
for p in self.paths:
try:
with open(p,"rt") as fp:
self.visit(ast.parse(fp.read(), p))
except:
pass
return tuple(self.modules)

if __name__ =="__main__":
import argparse

parser = argparse.ArgumentParser()
parser.add_argument("paths", nargs="+")
parser.add_argument("-r","--recursion", action="store_true", default=False)
args = parser.parse_args()

analysisor = Analysis(args.paths, args.recursion)
for m in analysisor.analysis():
print m