def IBAN(obj, value):
'''Checks that p_value corresponds to a valid IBAN number. IBAN stands
for International Bank Account Number (ISO 13616). If the number is
valid, the method returns True.'''
if not value: return True
# First, remove any non-digit or non-letter char
v = ''
for c in value:
if alpha.match(c): v += c
# Maximum size is 34 chars
if (len(v) < 8) or (len(v) > 34): return False
# 2 first chars must be a valid country code
if not countries.exists(v[:2].upper()): return False
# 2 next chars are a control code whose value must be between 0 and 96.
try:
code = int(v[2:4])
if (code < 0) or (code > 96): return False
except ValueError:
return False
# Perform the checksum
vv = v[4:] + v[:4] # Put the 4 first chars at the end.
nv = ''
for c in vv:
# Convert each letter into a number (A=10, B=11, etc)
# Ascii code for a is 65, so A=10 if we perform "minus 55"
if letter.match(c): nv += str(ord(c.upper()) - 55)
else: nv += c
return int(nv) % 97 == 1
def IBAN(obj, value):
'''Checks that p_value corresponds to a valid IBAN number. IBAN stands
for International Bank Account Number (ISO 13616). If the number is
valid, the method returns True.'''
if not value: return True
# First, remove any non-digit or non-letter char
v = ''
for c in value:
if alpha.match(c): v += c
# Maximum size is 34 chars
if (len(v) < 8) or (len(v) > 34): return False
# 2 first chars must be a valid country code
if not countries.exists(v[:2].upper()): return False
# 2 next chars are a control code whose value must be between 0 and 96.
try:
code = int(v[2:4])
if (code < 0) or (code > 96): return False
except ValueError:
return False
# Perform the checksum
vv = v[4:] + v[:4] # Put the 4 first chars at the end.
nv = ''
for c in vv:
# Convert each letter into a number (A=10, B=11, etc)
# Ascii code for a is 65, so A=10 if we perform "minus 55"
if letter.match(c): nv += str(ord(c.upper()) - 55)
else: nv += c
return int(nv) % 97 == 1
def BIC(obj, value):
'''Checks that p_value corresponds to a valid BIC number. BIC stands
for Bank Identifier Code (ISO 9362). If the number is valid, the
method returns True.'''
if not value: return True
# BIC number must be 8 or 11 chars
if len(value) not in (8, 11): return False
# 4 first chars, representing bank name, must be letters
for c in value[:4]:
if not letter.match(c): return False
# 2 next chars must be a valid country code
if not countries.exists(value[4:6].upper()): return False
# Last chars represent some location within a country (a city, a
# province...). They can only be letters or figures.
for c in value[6:]:
if not alpha.match(c): return False
return True
def BIC(obj, value):
'''Checks that p_value corresponds to a valid BIC number. BIC stands
for Bank Identifier Code (ISO 9362). If the number is valid, the
method returns True.'''
if not value: return True
# BIC number must be 8 or 11 chars
if len(value) not in (8, 11): return False
# 4 first chars, representing bank name, must be letters
for c in value[:4]:
if not letter.match(c): return False
# 2 next chars must be a valid country code
if not countries.exists(value[4:6].upper()): return False
# Last chars represent some location within a country (a city, a
# province...). They can only be letters or figures.
for c in value[6:]:
if not alpha.match(c): return False
return True
