-
-
Notifications
You must be signed in to change notification settings - Fork 252
Expand file tree
/
Copy pathpatch_linecache.py
More file actions
81 lines (66 loc) · 2.84 KB
/
patch_linecache.py
File metadata and controls
81 lines (66 loc) · 2.84 KB
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
74
75
76
77
78
79
80
81
import linecache
from typing import Any
class BPythonLinecache(dict):
"""Replaces the cache dict in the standard-library linecache module,
to also remember (in an unerasable way) bpython console input."""
def __init__(
self,
bpython_history: None | (list[tuple[int, None, list[str], str]]) = None,
*args,
**kwargs,
) -> None:
super().__init__(*args, **kwargs)
self.bpython_history = bpython_history or []
def is_bpython_filename(self, fname: Any) -> bool:
return isinstance(fname, str) and fname.startswith("<bpython-input-")
def get_bpython_history(self, key: str) -> tuple[int, None, list[str], str]:
"""Given a filename provided by remember_bpython_input,
returns the associated source string."""
try:
idx = int(key.split("-")[2][:-1])
return self.bpython_history[idx]
except (IndexError, ValueError):
raise KeyError
def remember_bpython_input(self, source: str) -> str:
"""Remembers a string of source code, and returns
a fake filename to use to retrieve it later."""
filename = f"<bpython-input-{len(self.bpython_history)}>"
self.bpython_history.append(
(len(source), None, source.splitlines(True), filename)
)
return filename
def __getitem__(self, key: Any) -> Any:
if self.is_bpython_filename(key):
return self.get_bpython_history(key)
return super().__getitem__(key)
def __contains__(self, key: Any) -> bool:
if self.is_bpython_filename(key):
try:
self.get_bpython_history(key)
return True
except KeyError:
return False
return super().__contains__(key)
def __delitem__(self, key: Any) -> None:
if not self.is_bpython_filename(key):
super().__delitem__(key)
def _bpython_clear_linecache() -> None:
if isinstance(linecache.cache, BPythonLinecache):
bpython_history = linecache.cache.bpython_history
else:
bpython_history = None
linecache.cache = BPythonLinecache(bpython_history)
# Monkey-patch the linecache module so that we are able
# to hold our command history there and have it persist
linecache.cache = BPythonLinecache(None, linecache.cache) # type: ignore
linecache.clearcache = _bpython_clear_linecache
def filename_for_console_input(code_string: str) -> str:
"""Remembers a string of source code, and returns
a fake filename to use to retrieve it later."""
if isinstance(linecache.cache, BPythonLinecache):
return linecache.cache.remember_bpython_input(code_string)
else:
# If someone else has patched linecache.cache, better for code to
# simply be unavailable to inspect.getsource() than to raise
# an exception.
return "<input>"