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jalali.py
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jalali.py
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#! /usr/bin/python
# -*- coding: utf-8 -*-
# Jalali date converter
# 2014 07 25
# Ported from PHP (http://jdf.scr.ir/) to Python (2&3) by Mohammad Javad Naderi <mjnaderi@gmail.com>
#
# As mentioned in http://jdf.scr.ir/, the original code is free and open source,
# and you are not allowed to sell it. You can read more in http://jdf.scr.ir/.
#
# Original License Notes:
#
# /** Software Hijri_Shamsi , Solar(Jalali) Date and Time
# Copyright(C)2011, Reza Gholampanahi , http://jdf.scr.ir
# version 2.55 :: 1391/08/24 = 1433/12/18 = 2012/11/15 */
#
# /** Convertor from and to Gregorian and Jalali (Hijri_Shamsi,Solar) Functions
# Copyright(C)2011, Reza Gholampanahi [ http://jdf.scr.ir/jdf ] version 2.50 */
"""
Example Usage:
>>> import jalali
>>> jalali.Persian('1393-1-11').gregorian_string()
'2014-3-31'
>>> jalali.Persian(1393, 1, 11).gregorian_datetime()
datetime.date(2014, 3, 31)
>>> jalali.Persian('1393/1/11').gregorian_string("{}/{}/{}")
'2014/3/31'
>>> jalali.Persian((1393, 1, 11)).gregorian_tuple()
(2014, 3, 31)
>>> jalali.Gregorian('2014-3-31').persian_string()
'1393-1-11'
>>> jalali.Gregorian('2014,03,31').persian_tuple()
(1393, 1, 11)
>>> jalali.Gregorian(2014, 3, 31).persian_year
1393
"""
import re
import datetime
class Gregorian:
def __init__(self, *date):
# Parse date
if len(date) == 1:
date = date[0]
if type(date) is str:
m = re.match(r'^(\d{4})\D(\d{1,2})\D(\d{1,2})$', date)
if m:
[year, month, day] = [int(m.group(1)), int(m.group(2)), int(m.group(3))]
else:
raise Exception("Invalid Input String")
elif type(date) is datetime.date:
[year, month, day] = [date.year, date.month, date.day]
elif type(date) is tuple:
year, month, day = date
year = int(year)
month = int(month)
day = int(day)
else:
raise Exception("Invalid Input Type")
elif len(date) == 3:
year = int(date[0])
month = int(date[1])
day = int(date[2])
else:
raise Exception("Invalid Input")
# Check the validity of input date
try:
datetime.datetime(year, month, day)
except:
raise Exception("Invalid Date")
self.gregorian_year = year
self.gregorian_month = month
self.gregorian_day = day
# Convert date to Jalali
d_4 = year % 4
g_a = [0, 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334]
doy_g = g_a[month] + day
if d_4 == 0 and month > 2:
doy_g += 1
d_33 = int(((year - 16) % 132) * .0305)
a = 286 if (d_33 == 3 or d_33 < (d_4 - 1) or d_4 == 0) else 287
if (d_33 == 1 or d_33 == 2) and (d_33 == d_4 or d_4 == 1):
b = 78
else:
b = 80 if (d_33 == 3 and d_4 == 0) else 79
if int((year - 10) / 63) == 30:
a -= 1
b += 1
if doy_g > b:
jy = year - 621
doy_j = doy_g - b
else:
jy = year - 622
doy_j = doy_g + a
if doy_j < 187:
jm = int((doy_j - 1) / 31)
jd = doy_j - (31 * jm)
jm += 1
else:
jm = int((doy_j - 187) / 30)
jd = doy_j - 186 - (jm * 30)
jm += 7
self.persian_year = jy
self.persian_month = jm
self.persian_day = jd
def persian_tuple(self):
return self.persian_year, self.persian_month, self.persian_day
def persian_string(self, date_format="{}-{}-{}"):
return date_format.format(self.persian_year, self.persian_month, self.persian_day)
class Persian:
def __init__(self, *date):
# Parse date
if len(date) == 1:
date = date[0]
if type(date) is str:
m = re.match(r'^(\d{4})\D(\d{1,2})\D(\d{1,2})$', date)
if m:
[year, month, day] = [int(m.group(1)), int(m.group(2)), int(m.group(3))]
else:
raise Exception("Invalid Input String")
elif type(date) is tuple:
year, month, day = date
year = int(year)
month = int(month)
day = int(day)
else:
raise Exception("Invalid Input Type")
elif len(date) == 3:
year = int(date[0])
month = int(date[1])
day = int(date[2])
else:
raise Exception("Invalid Input")
# Check validity of date. TODO better check (leap years)
if year < 1 or month < 1 or month > 12 or day < 1 or day > 31 or (month > 6 and day == 31):
raise Exception("Incorrect Date")
self.persian_year = year
self.persian_month = month
self.persian_day = day
# Convert date
d_4 = (year + 1) % 4
if month < 7:
doy_j = ((month - 1) * 31) + day
else:
doy_j = ((month - 7) * 30) + day + 186
d_33 = int(((year - 55) % 132) * .0305)
a = 287 if (d_33 != 3 and d_4 <= d_33) else 286
if (d_33 == 1 or d_33 == 2) and (d_33 == d_4 or d_4 == 1):
b = 78
else:
b = 80 if (d_33 == 3 and d_4 == 0) else 79
if int((year - 19) / 63) == 20:
a -= 1
b += 1
if doy_j <= a:
gy = year + 621
gd = doy_j + b
else:
gy = year + 622
gd = doy_j - a
for gm, v in enumerate([0, 31, 29 if (gy % 4 == 0) else 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]):
if gd <= v:
break
gd -= v
self.gregorian_year = gy
self.gregorian_month = gm
self.gregorian_day = gd
def gregorian_tuple(self):
return self.gregorian_year, self.gregorian_month, self.gregorian_day
def gregorian_string(self, date_format="{}-{}-{}"):
return date_format.format(self.gregorian_year, self.gregorian_month, self.gregorian_day)
def gregorian_datetime(self):
return datetime.date(self.gregorian_year, self.gregorian_month, self.gregorian_day)