tools.py
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from datetime import (
datetime,
date,
time,
)
from decimal import Decimal
from mmap import (
mmap,
ACCESS_READ,
)
#################
# Compare value #
#################
MIDNIGHT_TIME = time(0, 0, 0)
def split_time(t) -> tuple:
if isinstance(t, datetime):
return t.date(), t.time()
return t, MIDNIGHT_TIME
def is_same(a, b) -> bool:
if a == b:
return True
if not (isinstance(a, date) or isinstance(a, datetime)):
return False
date_a, time_a = split_time(a)
date_b, time_b = split_time(b)
if date_a != date_b:
return False
if isinstance(a, date) or isinstance(b, date):
return True
if time_a == time_b:
return True
return False
################
# Plain Object #
################
def date_str(v):
return f'{v.year}-{v.month:02}-{v.day:02}'
def time_str(v):
return f'{v.hour:02}:{v.minute:02}:{v.second:02}'
def datetime_str(v):
s_date = date_str(v)
s_time = time_str(v)
s_msec = v.microsecond and f'.{v.microsecond}' or ''
return f'{s_date} {s_time}{s_msec}'
def plain_value(v):
if isinstance(v, str):
return v
if isinstance(v, datetime):
return datetime_str(v)
if isinstance(v, date):
return date_str(v)
if isinstance(v, Decimal):
return float(v)
if isinstance(v, time):
return time_str(v)
return v
def plain_values(d):
r = dict()
for key in d:
v = d[key]
r[str(key)] = plain_value(v)
return r
def update(source: dict, target: dict):
target_update = dict()
log_msg = []
for field in target:
if field not in source:
continue
source_value = source[field]
target_value = target[field]
if not is_same(source_value, target_value):
target_update[field] = source_value
log_source_value = plain_value(source_value)
log_target_value = plain_value(target_value)
log_msg.append('{f} {t} to be {s}'.format(
f=field, t=[log_target_value], s=[log_source_value]))
return target_update, log_msg
class BacaFile:
def __init__(self, filename, cari=''):
if cari:
self.is_found = False
else:
self.is_found = True
is_first = True
self.file = open(filename, 'rb')
s = mmap(self.file.fileno(), 0, access=ACCESS_READ)
while cari:
pos = s.find(cari.encode('utf-8'))
if pos == -1: # Tidak ketemu
return
if pos == 0: # Ketemu di baris ke-1
self.is_found = True
break
if not is_first:
self.file.seek(pos)
self.file.readline()
self.is_found = True
break
cari = '\n' + cari # Cari di baris berikutnya
self.file.seek(0)
is_first = False
def close(self):
self.file.close()
def readline(self):
if self.is_found:
return self.file.readline()
def __enter__(self):
return self.file
def __exit__(self, type, value, traceback):
self.close()