Generate cov3 files used in DEMIC
Project description
pycov3
A package for generating cov3 files which are generated from sam files giving coverage information and a fasta file giving binned contigs. Cov3 files are used as input for the DEMIC R package which calculates PTR, an estimate for bacterial growth rates.
Install it from PyPI
pip install pycov3
Usage
Create a SAM directory and FASTA directory, set any non-default window or coverage parameters, then create a COV3 directory and use it to generate a COV3 file for each contig set in the FASTA directory.
from pycov3.Directory import Cov3Dir, FastaDir, SamDir
sam_d = SamDir(Path("/path/to/sams/"), False)
window_params = {
"window_size": None,
"window_step": None,
"edge_length": sam_d.calculate_edge_length(),
}
coverage_params = {
"mapq_cutoff": None,
"mapl_cutoff": None,
"max_mismatch_ratio": None,
}
window_params = {k: v for k, v in window_params.items() if v is not None}
coverage_params = {k: v for k, v in coverage_params.items() if v is not None}
fasta_d = FastaDir(Path("/path/to/fastas/"), False)
cov3_d = Cov3Dir(
Path(args.out_dir),
False,
fasta_d.get_filenames(),
window_params,
coverage_params,
)
cov3_d.generate(sam_d, fasta_d)
Alternatively, to use the bare application logic and do all the file handling yourself, you can use the Cov3Generator
class which takes a list of generators as SAM inputs and a generator as a FASTA input.
from pycov3.Cov3Generator import Cov3Generator
cov3_generator = Cov3Generator(
sam_generators,
fasta_generator,
sample,
bin_name,
window_params,
**coverage_params,
)
cov3_dict = cov3_generator.generate()
$ python -m pycov3 -h
#or
$ pycov3 -h
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