FilesExpand file tree

master

/

template.py

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

73 lines (49 loc) · 1.29 KB

master

/

template.py

Copy path

Top

File metadata and controls

• Code
• Blame

73 lines (49 loc) · 1.29 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

"""

An example of the Template pattern in Python

*TL;DR

Defines the skeleton of a base algorithm, deferring definition of exact

steps to subclasses.

*Examples in Python ecosystem:

Django class based views: https://docs.djangoproject.com/en/2.1/topics/class-based-views/

"""

def get_text() -> str:

return "plain-text"

def get_pdf() -> str:

return "pdf"

def get_csv() -> str:

return "csv"

def convert_to_text(data: str) -> str:

print("[CONVERT]")

return f"{data} as text"

def saver() -> None:

print("[SAVE]")

def template_function(getter, converter=False, to_save=False) -> None:

data = getter()

print(f"Got `{data}`")

if len(data) <= 3 and converter:

data = converter(data)

else:

print("Skip conversion")

if to_save:

saver()

print(f"`{data}` was processed")

def main():

"""

>>> template_function(get_text, to_save=True)

Got `plain-text`

Skip conversion

[SAVE]

`plain-text` was processed

>>> template_function(get_pdf, converter=convert_to_text)

Got `pdf`

[CONVERT]

`pdf as text` was processed

>>> template_function(get_csv, to_save=True)

Got `csv`

Skip conversion

[SAVE]

`csv` was processed

"""

if __name__ == "__main__":

import doctest

doctest.testmod()