source.py 文件源码

def get_statement_startend2(lineno, node):
    import ast
    # flatten all statements and except handlers into one lineno-list
    # AST's line numbers start indexing at 1
    l = []
    for x in ast.walk(node):
        if isinstance(x, _ast.stmt) or isinstance(x, _ast.ExceptHandler):
            l.append(x.lineno - 1)
            for name in "finalbody", "orelse":
                val = getattr(x, name, None)
                if val:
                    # treat the finally/orelse part as its own statement
                    l.append(val[0].lineno - 1 - 1)
    l.sort()
    insert_index = bisect_right(l, lineno)
    start = l[insert_index - 1]
    if insert_index >= len(l):
        end = None
    else:
        end = l[insert_index]
    return start, end