Hello.
Is there an easy one-line way to see if a list of strings contains at least one occurance of a substring? E.g.
string_list=["PG2213-006B","PG0231+0 51E","PG2213-006A"]
substring_list=["PG2213-006","PG0231"]
I really don't want to loop, as I loop too many times in my code already.
Here's the way it is now: images is a list of image names refdict contains full names as keys hdrs contains some of those keys but truncated -
for image in images:
-
for x in refdict.keys(): if x.find(hdrs[image]['some keyword']) != -1: print "Already have that key, skipping image."
but this way I have to either continue with the checking of the substring even after I've found it once or insert a break statement which means another if-control statement which means more incomprehensibl e code.
I tried with something like - if x.find(hdrs[image]['some keyword']) !=-1 for x in refdict.keys():
-
but that naturally didn't want to work for me. Is there a way of using has_key but only make it find a substring of the key instead of the whole key?
any help will be greatly appreciated!
3 21801 bvdet 2,851
Recognized Expert Moderator Specialist
Hello.
Is there an easy one-line way to see if a list of strings contains at least one occurance of a substring? E.g.
string_list=["PG2213-006B","PG0231+0 51E","PG2213-006A"]
substring_list=["PG2213-006","PG0231"]
I really don't want to loop, as I loop too many times in my code already.
Here's the way it is now: images is a list of image names refdict contains full names as keys hdrs contains some of those keys but truncated -
for image in images:
-
for x in refdict.keys(): if x.find(hdrs[image]['some keyword']) != -1: print "Already have that key, skipping image."
but this way I have to either continue with the checking of the substring even after I've found it once or insert a break statement which means another if-control statement which means more incomprehensibl e code.
I tried with something like - if x.find(hdrs[image]['some keyword']) !=-1 for x in refdict.keys():
-
but that naturally didn't want to work for me. Is there a way of using has_key but only make it find a substring of the key instead of the whole key?
any help will be greatly appreciated!
Maybe you can use this: - import re
-
-
string_list=["PG2213-006B","PG0231+051E","PG2213-006A"]
-
-
substring_list=["PG2213-005","PG0231","D0000","PG2213-006"]
-
-
patt = r'%s' % '|'.join(substring_list)
-
print [re.match(patt, i) for i in string_list]
-
-
if None not in [re.match(patt, i) for i in string_list]:
-
print 'Perform some action'
-
else:
-
print 'No match'
-
-
'''
-
>>> [<_sre.SRE_Match object at 0x00E1A4B8>, <_sre.SRE_Match object at 0x00E1A4F0>, <_sre.SRE_Match object at 0x00E1A528>]
-
Perform some action
-
>>>
-
'''
Hello.
Is there an easy one-line way to see if a list of strings contains at least one occurance of a substring? E.g.
string_list=["PG2213-006B","PG0231+0 51E","PG2213-006A"]
substring_list=["PG2213-006","PG0231"]
using simple string methods -
>>> string_list=' '.join(["PG2213-006B","PG0231+051E","PG2213-006A"])
-
>>> substring_list=["PG2213-006","PG0231"]
-
>>> for i in substring_list:
-
... if i in string_list:
-
... print "substring ", i , "found"
-
...
-
substring PG2213-006 found
-
substring PG0231 found
-
>>>
-
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