Off topic:Rename fasta file header with name available in the text file

Question

[shashank.gupta]

Hi, I am trying to change the fasta header with a given list. I have a fasta file which looks like-

>P1212_1 M04I6TDD
GACGAACGCTGGCGGCGTGCTTAACACATGCAAGTCGAACGAGAGGAGAAGGAAGCTTGCCTCTTTCAAATCT
>P1213_2 M04JTWVX 
GATAAACGCTGGCGGCGCACATAAGACATGCAAGTCGAACGAACTTAACCATTAGTTTACTATTGGAGCGGTTAGTG

And I have another file in text format (tab delimited), which looks like -

P1212  SHA1111
P1213  SHA2222
P1214  SHA3333

I want to rename the header of above fasta file according to corresponding name, the output file looks like-

>SHA1111_1 M04I6TDD 
GACGAACGCTGGCGGCGTGCTTAACACATGCAAGTCGAACGAGAGGAGAAGGAAGCTTGCCTCTTTCAAATCT
>SHA2222_2 M04JTWVX 
GATAAACGCTGGCGGCGCACATAAGACATGCAAGTCGAACGAACTTAACCATTAGTTTACTATTGGAGCGGTTAGTG

I am trying to use scripts mentioned here Renaming fasta headers according to a matching name list , but the output file is not correct. I'm so grateful for helping. Regards.