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# This code is part of the Biopython distribution and governed by its
# license. Please see the LICENSE file that should have been included
# as part of this package.
"""Helper script to update Codon tables from the NCBI.
These tables are based on parsing the NCBI file:
ftp://ftp.ncbi.nih.gov/entrez/misc/data/gc.prt
This script is used to update Bio/Data/CodonTable.py
Note that the NCBI sometimes revise the older tables,
so don't just add new tables - replace all of them
and check for any differences in the old tables.
"""
import re
INDENT = len("register_ncbi_table(")
def line_wrap(text, indent=0, max_len=78):
if len(text) <= max_len:
return text
line = text[:max_len]
assert " " in line, line
line, rest = line.rsplit(" ", 1)
rest = " " * indent + rest + text[max_len:]
assert len(line) < max_len
if indent + len(rest) <= max_len:
return line + "\n" + rest
else:
return line + "\n" + line_wrap(rest, max_len)
print("##########################################################################")
print("# Start of auto-generated output from Scripts/update_ncbi_codon_table.py #")
print("##########################################################################")
print("")
print("")
for line in open("gc.prt").readlines():
if line[:2] == " {":
names = []
id = None
aa = None
start = None
bases = []
elif line[:6] == " name":
names.append(re.search('"([^"]*)"', line).group(1))
elif line[:8] == " name":
names.append(re.search('"(.*)$', line).group(1))
elif line == ' Mitochondrial; Mycoplasma; Spiroplasma" ,\n':
names[-1] = names[-1] + " Mitochondrial; Mycoplasma; Spiroplasma"
elif line[:4] == " id":
id = int(re.search('(\d+)', line).group(1))
elif line[:10] == " ncbieaa ":
aa = line[12:12 + 64]
elif line[:10] == " sncbieaa":
start = line[12:12 + 64]
elif line[:9] == " -- Base":
bases.append(line[12:12 + 64])
elif line[:2] == " }":
assert names != [] and id is not None and aa is not None
assert start is not None and bases != []
if len(names) == 1:
names.append(None)
print("register_ncbi_table(name=%r," % names[0])
print(" " * INDENT + "alt_name=%r, id=%d," % (names[1], id))
print(" " * INDENT + "table={")
s = " "
for i in range(64):
if aa[i] != "*":
t = " '%s%s%s': '%s'," % (bases[0][i], bases[1][i],
bases[2][i], aa[i])
if len(s) + len(t) > 75:
print(s)
s = " " + t
else:
s += t
print("%s }," % s)
codons = [bases[0][i] + bases[1][i] + bases[2][i]
for i in range(64) if aa[i] == "*"]
print(line_wrap(" " * INDENT + "stop_codons=%r," % codons, indent=INDENT + 13))
codons = [bases[0][i] + bases[1][i] + bases[2][i]
for i in range(64) if start[i] == "M"]
print(line_wrap(" " * INDENT + "start_codons=%r)" % codons, indent=INDENT + 14))
print("")
elif line[:2] == "--" or line in ("\n", "}\n", 'Genetic-code-table ::= {\n'):
pass
else:
raise Exception("Unparsed: " + repr(line))
print("")
print("########################################################################")
print("# End of auto-generated output from Scripts/update_ncbi_codon_table.py #")
print("########################################################################")
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