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资源说明：A string scanner class for Python
# Scanner #
Python Scanner class for scanning (i.e. lexical analysis of) strings. The class
is styled after Ruby's StringScanner, but is not 100% the same. For usage,
see docs/scanner.html which contains HTML API docs, or use PyDoc.
## Examples ##
### Simple ###
Parsing a simple date format:
scanner = Scanner('09/3/2011 12:15:45')
day = scanner.scan(r'\d+') # -> '09'
scanner.get() # -> /
month = scanner.scan(r'\d+') # -> '3'
scanner.get() # -> /
year = scanner.scan(r'\d+') # -> '2011'
scanner.scan(r'\s+') # -> ' '
hour = scanner.scan(r'\d+') # -> '12'
scanner.get() # -> :
minute = scanner.scan(r'\d+') # -> '15'
scanner.get() # -> :
second = scanner.scan(r'\d+') # -> '45'
print (day, month, year, hour, minute, second) # -> ('09', '3', '2011', '12', '15', '45')
For non-trivial examples, see in the examples/ directory:
* json.py - a full (but error-intolerant) JSON parser using the obvious
recursive descent approach. Scanner is used to power the 'does this match?'
bits, but this is a non-trivial program in itself.
* javascript.py - A simple JavaScript tokenizer using Scanner. Its relation to
Scanner is very close (very little is done except using Scanner's methods),
so this is a good one to look at first.
## License ##
Scanner is licensed under the new BSD license.
http://asgaard.co.uk/p/Python-StringScanner
https://github.com/markwatkinson/python-string-scanner
本源码包内暂不包含可直接显示的源代码文件，请下载源码包。
