The documentation关于 CommandLineApp 的子类化真的很模糊,只提到一个例子:
class YourApp(cli.app.CommandLineApp):
def main(self):
do_stuff()
根据我找到的信息,我拼凑了这段代码:
#!/usr/bin/env python
import os
import sys
from cli.app import CommandLineApp
# Append the parent folder to the python path
sys.path.append(os.path.join(os.path.dirname(__file__), '../'))
import tabulardata
from addrtools import extract_address
class SplitAddressApp(CommandLineApp):
def main(self):
"""
Split an address from one column to separate columns.
"""
table = tabulardata.from_file(self.params.file)
def for_each_row(i, item):
addr = extract_address(item['Address'])
print '%-3d %-75s %s' % (i, item['Address'], repr(addr))
table.each(for_each_row)
def setup(self):
self.add_param('file', metavar='FILE', help='The data file.')
self.add_param(
'cols', metavar='ADDRESS_COLUMN', nargs='+',
help='The name of the address column. If multiple names are ' + \
'passed, each column will be checked for an address in order'
)
if __name__ == '__main__':
SplitAddressApp().run()
这对我来说似乎是正确的。该文档没有提供有关如何处理 setup
方法或在使用子类化时运行应用程序的示例。我收到错误:
Traceback (most recent call last): File "bin/split_address_column", line 36, in SplitAddressApp().run() File "/Users/tomas/.pythonbrew/venvs/Python-2.7.3/address_cleaner/lib/python2.7/site-packages/cli/app.py", line 440, in __init__ Application.__init__(self, main, **kwargs) File "/Users/tomas/.pythonbrew/venvs/Python-2.7.3/address_cleaner/lib/python2.7/site-packages/cli/app.py", line 129, in __init__ self.setup() File "bin/split_address_column", line 28, in setup self.add_param('file', metavar='FILE', help='The data file.') File "/Users/tomas/.pythonbrew/venvs/Python-2.7.3/address_cleaner/lib/python2.7/site-packages/cli/app.py", line 385, in add_param action = self.argparser.add_argument(*args, **kwargs) AttributeError: 'SplitAddressApp' object has no attribute 'argparser'
所以大概我做错了什么,但是什么?
最佳答案
我想通了。阅读 pyCLI 的源代码发现 setup
函数对于整个库的功能非常重要,而我认为它只是一个可以放置设置代码的函数。 argparser
是在 cli.app.CommandLineApp.setup
中创建的,这意味着我至少必须调用
cli.app.CommandLineApp.setup(self)
在设置函数中它甚至可以工作。现在代码可以完美运行了!
关于python - 如何子类化 pyCLI 的 cli.app.CommandLineApp?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/12341444/