Question

朋友们，请帮助我在Windows中复制文件夹时如何更新WX Widgets python中的进度条。我试着搜索了很多。我对python有所了解，但并不是那么专业。只是想从控制台python编程切换到gui编程。请帮助我。

提前致谢！ Ganesh R

Answer 1

使用ProgressDialog's Update功能，或UpdatePulse，如果您只是需要向用户显示正在进行的操作。

pulse_dlg = wx.ProgressDialog(title="Dialog Title", message="Dialog Message", maximum=100)
# Some stuff happens
for i in range(10):
    wx.MilliSleep(250)
    pulse_dlg.Update(10*i)

您也可以允许用户中止操作，查看主题的Mike Driscoll's excellent tutorial。

Answer 2

您可以编写自己的copytree稍微修改过的版本，这将有助于：

import shutil
import os.path
import os

def file_copied():
    print "File copied!"

# Usage example:  copytree(src, dst, cb=file_copied)
def copytree(src, dst, symlinks=False, ignore=None, cb=None):
    """Recursively copy a directory tree using copy2().

    The destination directory must not already exist.
    If exception(s) occur, an Error is raised with a list of reasons.

    If the optional symlinks flag is true, symbolic links in the
    source tree result in symbolic links in the destination tree; if
    it is false, the contents of the files pointed to by symbolic
    links are copied.

    The optional ignore argument is a callable. If given, it
    is called with the `src` parameter, which is the directory
    being visited by copytree(), and `names` which is the list of
    `src` contents, as returned by os.listdir():

        callable(src, names) -> ignored_names

    Since copytree() is called recursively, the callable will be
    called once for each directory that is copied. It returns a
    list of names relative to the `src` directory that should
    not be copied.

    XXX Consider this example code rather than the ultimate tool.

    """
    names = os.listdir(src)
    if ignore is not None:
        ignored_names = ignore(src, names)
    else:
        ignored_names = set()

    os.makedirs(dst)
    errors = []
    for name in names:
        if name in ignored_names:
            continue
        srcname = os.path.join(src, name)
        dstname = os.path.join(dst, name)
        try:
            if symlinks and os.path.islink(srcname):
                linkto = os.readlink(srcname)
                os.symlink(linkto, dstname)
            elif os.path.isdir(srcname):
                copytree(srcname, dstname, symlinks, ignore)
            else:
                # Will raise a SpecialFileError for unsupported file types
                shutil.copy2(srcname, dstname)
                if cb is not None:
                    cb()
        # catch the Error from the recursive copytree so that we can
        # continue with other files
        except Error, err:
            errors.extend(err.args[0])
        except EnvironmentError, why:
            errors.append((srcname, dstname, str(why)))
    try:
        shutil.copystat(src, dst)
    except OSError, why:
        if WindowsError is not None and isinstance(why, WindowsError):
            # Copying file access times may fail on Windows
            pass
        else:
            errors.extend((src, dst, str(why)))
    if errors:
        raise Error, errors

所有这些代码与原始copytree在复制文件后调用指定函数的方式不同。因此，在您的情况下代替file_copied（），您可以使用Update（）对话框，或更新成功复制的文件数等等。

wxpython filecopy进度条

2 个答案: