Source code for agpy.grep
#py grep command
#sample command: grep("^x",dir())
#syntax: grep(regexp_string,list_of_strings_to_search)
import re
def grep(string,list):
expr = re.compile(string)
for text in list:
match = expr.search(text)
if match != None:
print match.string
# Two alternate solutions, courtesy of Gene H
# These are more elegant, and more detailed descriptions can be found here:
# http://www.faqs.org/docs/diveintopython/apihelper_filter.html
# http://www.faqs.org/docs/diveintopython/regression_filter.html
def grep(string,list):
expr = re.compile(string)
return [elem for elem in list if expr.match(elem)]
[docs]def grep(string,list):
expr = re.compile(string)
return filter(expr.search,list)
# Note a subtle difference between the above two:
# because the first uses expr.match(), it will only return exact matches
# while the latter will return a list containing strings that contain the
# search string in any position
# e.g.:
# list = ['normalize','size','nonzero','zenith']
# grep('ze',list)
# First one returns: ['zenith']
# Second one returns: ['normalize','size','nonzero','zenith']
[docs]def grepv(string,list):
""" grep -v - return elements that do NOT contain the string """
expr = re.compile(string)
return [elem for elem in list if not expr.search(elem)]