import cyvcf2 vcf_file = cyvcf2.VCF('file.vcf') for header in vcf_file.header_iter(): print(header)
import cyvcf2 vcf_file = cyvcf2.VCF('file.vcf') format_header = vcf_file.header_iter()['FORMAT'] print(format_header)This example uses the header_iter method to extract the format header information from a VCF file called 'file.vcf'. The format header contains information about the format of the data in the VCF file. The code prints the format header information to the console. In conclusion, python cyvcf2 is a package library that is used for parsing Variant Call Format (VCF) files in Python. The header_iter method is used for iterating over the header information of VCF files and extracting various information.