Python 项目没有修订属性时出错

输入：-

错误：-

CODE:-

import shlex
import os
import sys
import json
import fileinput
import pwd
import itertools
import subprocess
import shutil
from subprocess import Popen, PIPE, STDOUT
import xml.etree.ElementTree as ET
import re

def manifest_data (name):
    print name
    pattern = re.compile('refs/heads/(.*)')
    tree = ET.parse('.repo/manifests/test.xml')
    root = tree.getroot()
    project = root.find("./project[@name='%s']" % name)
    print project
    if project != None:
        revision = project.get('revision')
        res = pattern.match(revision)
        return res.group(1)
    else:
        default = root.find("./default")
        return default.attrib.get('revision')

def main ():
    branch_name = "jb_mr2"
    print "branch_name"
    print branch_name
    projects = ['platform/vendor/google/proprietary/widevine','platform/external/bus','platform/test/code']
    #if os.path.isdir('.repo') :
        #print "Deleting .repo"
        #shutil.rmtree('.repo')
    RepoInitCmd =  'repo init -u git://git.quicinc.com/platform/manifest.git -b ' + branch_name
    proc = subprocess.Popen(shlex.split(RepoInitCmd), stderr=subprocess.PIPE)
    out, error = proc.communicate()
    for project in projects :
        branch = manifest_data(project)
        print branch

if __name__ == '__main__':
    main()

回溯（最近一次呼叫最后一次）：
文件“branch_manifest.py”，第45行，在
main（）
文件“branch_manifest.py”，第41行，主目录
分支=清单数据（项目）
清单数据中第23行的文件“branch_manifest.py”
res=模式匹配（修订版）
TypeError:应为字符串或缓冲区

您需要更改

manifest\u data

如下：

Traceback (most recent call last):
  File "branch_manifest.py", line 45, in <module>
    main()
  File "branch_manifest.py", line 41, in main
    branch = manifest_data(project)
  File "branch_manifest.py", line 23, in manifest_data
    res = pattern.match(revision)
TypeError: expected string or buffer

Traceback (most recent call last):
  File "branch_manifest.py", line 45, in <module>
    main()
  File "branch_manifest.py", line 41, in main
    branch = manifest_data(project)
  File "branch_manifest.py", line 23, in manifest_data
    res = pattern.match(revision)
TypeError: expected string or buffer

def manifest_data (name):
    ....
    if project != None:
        revision = project.get('revision')
        if revision:
            res = pattern.match(revision)
            return res.group(1)
    default = root.find("./default")
    return default.attrib.get('revision')