解释Python编写vim插件

2

3

4

  echo "Error: Required vim compiled with +python"

  finish

endif

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

" Function definition is VimL. We can mix VimL and Python in

" function definition.

function! Reddit()

" We start the python code like the next line.

python << EOF

# the vim module contains everything we need to interface with vim from

# python. We need urllib2 for the web service consumer.

import vim, urllib2

# we need json for parsing the response

import json

# we define a timeout that we‘ll use in the API call. We don‘t want

# users to wait much.

TIMEOUT = 20

URL = "codego.net"

try:

  # Get the posts and parse the json response

  response = urllib2.urlopen(URL, None, TIMEOUT).read()

  json_response = json.loads(response)

  posts = json_response.get("data", "").get("children", "")

  # vim.current.buffer is the current buffer. It‘s list-like object.

  # each line is an item in the list. We can loop through them delete

  # them, alter them etc.

  # Here we delete all lines in the current buffer

  del vim.current.buffer[:]

  # Here we append some lines above. Aesthetics.

  vim.current.buffer[0] = 80*"-"

  for post in posts:

    # In the next few lines, we get the post details

    post_data = post.get("data", {})

    up = post_data.get("ups", 0)

    down = post_data.get("downs", 0)

    title = post_data.get("title", "NO TITLE").encode("utf-8")

    score = post_data.get("score", 0)

    permalink = post_data.get("permalink").encode("utf-8")

    url = post_data.get("url").encode("utf-8")

    comments = post_data.get("num_comments")

    # And here we append line by line to the buffer.

    # First the upvotes

    vim.current.buffer.append("↑ %s"%up)

    # Then the title and the url

    vim.current.buffer.append("  %s [%s]"%(title, url,))

    # Then the downvotes and number of comments

    vim.current.buffer.append("↓ %s  | comments: %s [%s]"%(down, comments, permalink,))

    # And last we append some "-" for visual appeal.

    vim.current.buffer.append(80*"-")

except Exception, e:

  print e

EOF

" Here the python code is closed. We can continue writing VimL or python again.

endfunction

2

3

4

5

6

7

8

9

10

11

12

13

14

  " Get the first argument by name in VimL

  let firstarg=a:arg1

  " Get the second argument by position in Viml

  let secondarg=a:1

  " Get the arguments in python

  python << EOF

  import vim

  first_argument = vim.eval("a:arg1") #or vim.eval("a:0")

  second_argument = vim.eval("a:arg2") #or vim.eval("a:1")

2

3

  let g:reddit_apicall_timeout=40

endif