動作環境

ideone (Python 3 (python 3.5)

概要

C++ Builderで設計中の機能をPython実装でさっと確認
年を通した366の要素にあらかじめマークを付け、それをもとにカレンダの該当箇所をマーク付けする
- C++ BuilderのTCalenderのACol, ARowの計算に使う

備考

曜日の定義は

0(Monday): python
- https://docs.python.org/3.7/library/calendar.html#calendar.weekday
  - Returns the day of the week (0 is Monday) for year (1970–…), month (1–12), day (1–31).
1(Sunday): Delphi

実装

# [x] PEP8 check

from datetime import datetime

aymd = datetime(2019, 7, 18, 12, 30, 45)


def getWeekDay(adate):
    return (adate.weekday() + 1) % 7  # for 0:Sunday[Delphi]


def getYearDay(adate):
    return (adate.timetuple().tm_yday)


def dispCal(alist):
    for idx in range(len(alist)):
        print(alist[idx], end='')
        if idx % 7 == 6:
            print()  # CRLF

# 1. preparation -------------------------
NUM_YEAR = 366  # maximum number of days in a year (including leap-year)
yrs = [[]]*NUM_YEAR
for idx in range(NUM_YEAR):
    yrs[idx] = 0
yrs[getYearDay(datetime(2019, 1, 1, 0, 0, 0))] = 1  # Jan
yrs[getYearDay(datetime(2019, 2, 1, 0, 0, 0))] = 1  # Feb.
yrs[getYearDay(datetime(2019, 3, 1, 0, 0, 0))] = 1  # Mar.
NUM_MONTH = 37  # 6 lines in calendar ( 7 * 5 lines + 2 [30, 31 days])
mts = [[]]*NUM_MONTH
for idx in range(NUM_MONTH):
    mts[idx] = 0

# 2. main part -------------------------

adt = datetime(2019, 2, 1, 0, 0, 0)  # ymdhns

awday = getWeekDay(adt)
ayday = getYearDay(adt)

for idx in range(31):  # 31: maximum for one month
    mts[awday + idx] = yrs[ayday + idx]

print('Feb')
dispCal(mts)

結果

備考

確認は済んだので、このコードはここまで。

さらに良いコードにする時間は今回は取らない。

関連

Python
- Convert Year/Month/Day to Day of Year in Python
- How do I get the day of week given a date in Python?
Delphi (C++ Builder)
- DayOfTheWeek
- DayOfTheYear
C++ Builder
- SysUtils.DayOfWeek 関数
  - 日曜が週の先頭で，土曜が 7 番めの曜日です。
- DateUtils.DayOfTheYear 関数
- DateUtils.DayOfTheWeek 関数
  - 1 は月曜，7 は日曜を示します。

C++ Builderに関してはDateUtilsを使う。