Python诅咒Git子进程的输出具有意外间距

Question

当我在python-curses屏幕中调用git时，我观察到一个奇怪的间距问题。在下面的最小工作示例中，我该怎么做，导致间距很小且不与屏幕侧面齐平？

最小工作示例：

import curses, subprocess

class MyApp(object):

    def __init__(self, stdscreen):
        self.screen = stdscreen
        self.screen.addstr("Loading..." + '\n')
        self.screen.refresh()

        url = 'http://github.com/octocat/Hello-World/'

        process = subprocess.Popen(['git', 'clone', url], stdout=subprocess.PIPE)

        self.screen.addstr("Press any key to continue.")

        self.screen.getch()

if __name__ == '__main__':
    curses.wrapper(MyApp)

输出：

Loading...
Press any key to continue.Cloning into 'Hello-World'...
                                                       warning: redirecting to https://github.com/octocat/Hello-World/
              remote: Enumerating objects: 13, done.
                                                    remote: Total 13 (delta 0), reused 0 (delta 0), pack-reused 13
Unpacking objects: 100% (13/13), done.3)

预期输出：

Loading...
Cloning into 'Hello-World'...
warning: redirecting to https://github.com/octocat/Hello-World/
remote: Enumerating objects: 13, done.
remote: Total 13 (delta 0), reused 0 (delta 0), pack-reused 13
Unpacking objects: 100% (13/13), done.3)
Press any key to continue.

Answer 1

[git clone将其信息性消息写入stderr，而不是stdout。

[From the documentation（加强调）：

-verbose

详细运行。不影响向[[标准错误流。]的进度状态报告。

---

考虑到此更新的MWE：

import curses, subprocess

class MyApp(object):

    def __init__(self, stdscreen):
        self.screen = stdscreen
        self.screen.addstr("Loading..." + '\n')
        self.screen.refresh()

        url = 'http://github.com/octocat/Hello-World/'

        #process = subprocess.Popen(['git', 'clone', url], stdout=subprocess.PIPE)

        # additional code from: https://stackoverflow.com/a/39564562/6924364

        dloutput = subprocess.Popen(['git', 'clone', '--progress', url], stderr=subprocess.PIPE, stdout=subprocess.PIPE)

        dloutput = dloutput.communicate()[1].decode('utf-8')

        self.screen.addstr(str(dloutput))    

        self.screen.addstr("Press any key to continue.")

        self.screen.getch()

if __name__ == '__main__':
    curses.wrapper(MyApp)