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validators/src/validators/finance.py at master · itzzdev09/validators · GitHub
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validators
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finance.py
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"""Finance."""
from
.
utils
import
validator
def
_cusip_checksum
(
cusip
:
str
):
check
,
val
=
0
,
None
for
idx
in
range
(
9
):
c
=
cusip
[
idx
]
if
c
>=
"0"
and
c
<=
"9"
:
val
=
ord
(
c
)
-
ord
(
"0"
)
elif
c
>=
"A"
and
c
<=
"Z"
:
val
=
10
+
ord
(
c
)
-
ord
(
"A"
)
elif
c
>=
"a"
and
c
<=
"z"
:
val
=
10
+
ord
(
c
)
-
ord
(
"a"
)
elif
c
==
"*"
:
val
=
36
elif
c
==
"@"
:
val
=
37
elif
c
==
"#"
:
val
=
38
else
:
return
False
if
idx
&
1
:
val
+=
val
check
=
check
+
(
val
//
10
)
+
(
val
%
10
)
return
(
check
%
10
)
==
0
def
_isin_checksum
(
value
:
str
):
check
,
val
=
0
,
None
for
idx
in
range
(
12
):
c
=
value
[
idx
]
if
c
>=
"0"
and
c
<=
"9"
and
idx
>
1
:
val
=
ord
(
c
)
-
ord
(
"0"
)
elif
c
>=
"A"
and
c
<=
"Z"
:
val
=
10
+
ord
(
c
)
-
ord
(
"A"
)
elif
c
>=
"a"
and
c
<=
"z"
:
val
=
10
+
ord
(
c
)
-
ord
(
"a"
)
else
:
return
False
if
idx
&
1
:
val
+=
val
return
(
check
%
10
)
==
0
@
validator
def
cusip
(
value
:
str
):
"""Return whether or not given value is a valid CUSIP.
Checks if the value is a valid [CUSIP][1].
[1]: https://en.wikipedia.org/wiki/CUSIP
Examples:
>>> cusip('037833DP2')
True
>>> cusip('037833DP3')
ValidationError(func=cusip, args={'value': '037833DP3'})
Args:
value: CUSIP string to validate.
Returns:
(Literal[True]): If `value` is a valid CUSIP string.
(ValidationError): If `value` is an invalid CUSIP string.
"""
return
len
(
value
)
==
9
and
_cusip_checksum
(
value
)
@
validator
def
isin
(
value
:
str
):
"""Return whether or not given value is a valid ISIN.
Checks if the value is a valid [ISIN][1].
[1]: https://en.wikipedia.org/wiki/International_Securities_Identification_Number
Examples:
>>> isin('037833DP2')
ValidationError(func=isin, args={'value': '037833DP2'})
>>> isin('037833DP3')
ValidationError(func=isin, args={'value': '037833DP3'})
Args:
value: ISIN string to validate.
Returns:
(Literal[True]): If `value` is a valid ISIN string.
(ValidationError): If `value` is an invalid ISIN string.
"""
return
len
(
value
)
==
12
and
_isin_checksum
(
value
)
@
validator
def
sedol
(
value
:
str
):
"""Return whether or not given value is a valid SEDOL.
Checks if the value is a valid [SEDOL][1].
[1]: https://en.wikipedia.org/wiki/SEDOL
Examples:
>>> sedol('2936921')
True
>>> sedol('29A6922')
ValidationError(func=sedol, args={'value': '29A6922'})
Args:
value: SEDOL string to validate.
Returns:
(Literal[True]): If `value` is a valid SEDOL string.
(ValidationError): If `value` is an invalid SEDOL string.
"""
if
len
(
value
)
!=
7
:
return
False
weights
=
[
1
,
3
,
1
,
7
,
3
,
9
,
1
]
check
=
0
for
idx
in
range
(
7
):
c
=
value
[
idx
]
if
c
in
"AEIOU"
:
return
False
val
=
None
if
c
>=
"0"
and
c
<=
"9"
:
val
=
ord
(
c
)
-
ord
(
"0"
)
elif
c
>=
"A"
and
c
<=
"Z"
:
val
=
10
+
ord
(
c
)
-
ord
(
"A"
)
else
:
return
False
check
+=
val
*
weights
[
idx
]
return
(
check
%
10
)
==
0
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