python delete ID from file 2 not find in file1 and save new result of file2 after delete id not find in file 1 in new file call (file3).

I also want to keep delete id from from file 2 in new file call (file 4)

file 1:

ID num seq CD_000009.1 237 SIRTSAVPSPKGKYYTLNGSK CD_000009.1 250 SIRTSAVPSPKGKYYTLNGSK CD_000010.1 126 STPCTTINKVKASGMKAIMMA CD_000010.1 196 DVYNKIHMGSKAENTAKKLNI CD_000088.3 198 GGISCVLQDGKVFEKAGVSIS CD_000170.1 615 TKTILKSSLSKSLQEGLIPGS CD_000180.2 794 TKFLSQIESDKLALLQVRAIL CD_000185.1 106 TVDFIRLKSYKNDQSTGDIKV CD_000225.1 895 EQATTSAQVAKLYRKQSQIQN CD_000312.2 853 EKFQKINQMVKNSDRVLKRSA

file2

ID num seq

CD_000009.1 603 HPTAQHEKMLKDTWCIEAAAR CD_000009.1 607 QHEKMLCDTWKIEAAARIREG CD_000009.1 215 LASGETVAAFKLTEPSSGSDA CD_000009.1 433 SEAAWKVTDEKIQIMGGMGFM CD_000009.1 477 ILRLFVALQGKMDKGKELSGL CD_000010.1 119 LGAGLPISTPKTTINKVCASG CD_006187.2 201 PVICAGGQDRKSDAAGYPHAT CD_000088.3 13 LQLGRLSSGPKWLVARGGCGG CD_000088.3 21 GPCWLVARGGKGGPRAWSQCG CD_001073867.1 1551 SGVGLGTKGGKASVIVSLTTQ CD_001073867.1 1562 ASVIVSLTTQKPQDLTPYSGK CD_000180.2 799 TKFLSQIESDKLALLQVRAIL CD_000009.1 477 ILRLFVALQGKMDKGKELSGL CD_000088.3 48 WSQRSAAGRVKRPPGPAGTEQ CD_065741.3 1026 QTTECLTPESKKQTTSNVASQ

expected result file3: (delete ID from file 2 not find in file1 save in file 3)

CD_000009.1 603 HPTAQHEKMLKDTWCIEAAAR CD_000009.1 607 QHEKMLCDTWKIEAAARIREG CD_000009.1 215 LASGETVAAFKLTEPSSGSDA CD_000009.1 433 SEAAWKVTDEKIQIMGGMGFM CD_000009.1 477 ILRLFVALQGKMDKGKELSGL CD_000010.1 119 LGAGLPISTPKTTINKVCASG CD_000088.3 13 LQLGRLSSGPKWLVARGGCGG CD_000088.3 21 GPCWLVARGGKGGPRAWSQCG CD_000180.2 799 TKFLSQIESDKLALLQVRAIL CD_000009.1 477 ILRLFVALQGKMDKGKELSGL CD_000088.3 48 WSQRSAAGRVKRPPGPAGTEQ

keep delete ID from file 2 and save it in file 4:

# id from file2 not find in file 1:

CD_006187.2 201 PVICAGGQDRKSDAAGYPHAT CD_001073867.1 1551 SGVGLGTKGGKASVIVSLTTQ CD_001073867.1 1562 ASVIVSLTTQKPQDLTPYSGK CD_065741.3 1026 QTTECLTPESKSQTTSNVASQ

I tried to do these steps but I could not get same what I expected to have :

my code:

# result3 contian id from file 2 in file 1

#result4 contian id from file2 not in file 1 file1 = open('file1.txt').readlines() with open('result_file3.txt', 'w') as result3: with open('result_file4.txt', 'w') as result4: for line in open('file2.txt'): if line in file1: result3.write(line) else: result4.write(line)