Hi Mike, thanks to reply my question.
In my case the extract function is unuseful because it needs a datetime
to extract parts of it
but I don't have a datetime but a codified date.
I need to manage a string which is a personal code with info about name,
birthday, birth place and gender.
Infact the birth month is represented by a single letter (not in
sequential order)
A=jan
B=feb
C=mar
D=apr
E=may
F= -----
G= -----
H=jun
I= -----
J= -----
K= -----
L=jul
M=aug
N= -----
O= -----
P=sep
Q= -----
R=oct
S=nov
T=dec
....
the day contains also the gender, (female is incremented of 40)
the birth year has only 2 digits.
Examples:
60R11 = 1960-10-11 male
60R51 = 1960-10-11 female
00T41 = 1900-12-01 female
00T01 = 1900-12-01 male
I'm looking for a function to decode such string.
I thought I could create a python function to manage it.
j
On 07/05/2015 22:01, Mike Bayer wrote:
On 5/7/15 9:10 AM, jo wrote:
Hi all,
I would like to create a python customer function to extract data from a
table column and return a calculated value as in:
def birth(data):
mm =
dict(A='01',B='02',C='03',D='04',E='05',H='06',L='07',M='08',P='09',R='10',S='11',T='12')
return '19'+data[6:8] +'-'+ mm[data[8:9]] +'-'+ data[9:11]
sa.func.to_date( birth(Anagrafica.c.dato_fiscale), 'YYYY-mm-dd'))
in: Anagrafica.c.dato_fiscale='ZZZHHH54M11Z128Y'
out: '1954-08-11'
How can I do this in a sqlalchemy query?
look into using the extract() function:
http://docs.sqlalchemy.org/en/rel_1_0/core/sqlelement.html?highlight=extract#sqlalchemy.sql.expression.extract
it mostly works the same on all backends, here's PG's docs:
http://www.postgresql.org/docs/8.1/static/functions-datetime.html#FUNCTIONS-DATETIME-EXTRACT
thanks for any help.
j
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