Joe Healey - 2 months ago 13

Python Question

I'm struggling to synthesise several answers I've been reading that come close to what I'm trying to do, and I can't formulate some google-fu that'll get me any existing answer! I know it's really simple but I'm at a loss now.

Very similar to this question, I want to find several strings that I've read into a tuple that occurr in another file, however, I only want the lines where *each* string is matched *only once*. So

`any`

`all`

What I've got so far is close,

`line.count`

Firstly,

`line.count`

I know I'm doing something wrong with how I'm iterating/searching each key and/or using the

`== 1`

The tuple of strings I'm looking for is:

`['AG49', 'AG51', 'AGBD', 'AGHT', 'AGJN', 'AGKC', 'AGNP', 'AGTI', 'LG01', 'LG33', 'LG45']`

And some example lines of the file to search are (they will have anything from 2 to many tens of entries (OG_1000 below is actually the longest line/most members):

`OG_1000: AG49|00461 AG49|03016 AG49|03395 AG49|01465 AG49|01485 AG49|02179 AG49|02513 AG49|03071 AG49|03396 AG49|02649 AG51|00302 AG51|00779 AG51|01746 AG51|02077 AG51|02502 AG51|01654 AG51|01963 AG51|01965 AGBD|01544 AGBD|02407 AGBD|02722 AGBD|03152 AGBD|02292 AGBD|03607 AGBD|03608 AGBD|03609 AGHT|00130 AGHT|00873 AGHT|00911 AGHT|01291 AGHT|02476 AGHT|02881 AGHT|02477 AGHT|02973 AGHT|02974 AGHT|02975 AGJN|00381 AGJN|00633 AGJN|01876 AGJN|02007 AGJN|02058 AGJN|02059 AGJN|02060 AGJN|02398 AGJN|02399 AGJN|02433 AGJN|02418 AGKC|00658 AGKC|00659 AGKC|00660 AGKC|01985 AGKC|02826 AGKC|02881 AGKC|01323 AGKC|01327 AGKC|01324 AGKC|02267 AGKC|02827 AGKC|02880 AGKC|04269 AGKC|02428 AGNP|00290 AGNP|02833 AGNP|03160 AGNP|03601 AGNP|03987 AGNP|03988 AGNP|03989 AGNP|04108 AGTI|00388 AGTI|01459 AGTI|03163 AGTI|03688 AGTI|00570 AGTI|04026 AGTI|03715 AGTI|03716 AGTI|03717 LG01|00908 LG01|00909 LG01|00910 LG01|01116 LG01|03323 LG01|03588 LG01|03589 LG01|03590 LG01|03591 LG01|01118 LG01|01908 LG01|03182 LG01|03189 LG01|01906 LG33|01192 LG33|01786 LG33|01787 LG33|01973 LG33|03700 LG33|04518 LG33|04759 LG33|01756 LG33|01760 LG33|01971 LG33|02055 LG33|02056 LG33|02057 LG45|00001 LG45|01508 LG45|01643 LG45|00233 LG45|00786 LG45|01599 LG45|01600 LG45|01601 LG45|04210 LG45|04212 LG45|04213 LG45|04637 LG45|03265 LG45|04211 LG45|03255 LG45|03261 AG51|00629 AGKC|04214 AG49|02651 AGBD|01546 AGKC|02430 AGNP|02835 AGTI|01461 LG45|00784 LG33|04104 LG45|00192 LG45|00193 LG33|00381 LG33|01750`

OG_1082: AG49|00880 AG49|02960 AG51|02815 AG51|04137 AGNP|00113 AGNP|03735 AGTI|00006 AGTI|02047 AGBD|01827 AGHT|00357 AGJN|03158 AGKC|02788 LG01|01472 LG33|02682 LG45|01009

OG_7229: LG33|04676 LG45|01800

An example valid line would be:

`OG_1264: AG49|00061 AG51|03472 AGBD|01583 AGHT|03015 AGJN|02348 AGKC|00003 AGNP|02702 AGTI|02067 LG01|00073 LG33|02222 LG45|04062`

Where each string occurs only once.

My code at the moment (minus some option parsing etc):

`# Get a tuple of strings to iterate over`

def getKeys(nameFile):

with open(nameFile, "r") as namehandle:

names = []

for line in namehandle:

strip = line.rstrip('\n')

names.append(strip)

return names

# Main code:

keys = getKeys(nameFile)

matchedLines = []

with open(args.infile, "r") as clusterFile:

for line in clusterFile:

for key in keys:

if line.count(key) == 1:

matchedLines.append(line)

Answer

In your code, `matchedLines`

will have many times the same line and it still doesn't give you the lines that match all of the keys once. For that purpose, you can still use `all`

:

```
with open(args.infile, "r") as clusterFile:
matchedLines = [line for line in clusterFile if all([line.count(key) == 1 for key in keys])]
```