Clase para editar un archivo de configuración
Publicado por CARLOS (19 intervenciones) el 30/07/2019 13:45:58
Hola foreros:
En mi proyecto, utilizo un archivo de configuración (file.conf) con el siguiente formato:
Intento utilizar la clase siguiente en un ecript para poder modificar los parámetros pero no consigo hacerlo.
Me podeis echar una mano...?
Gracia de antemano.
En mi proyecto, utilizo un archivo de configuración (file.conf) con el siguiente formato:
1
2
3
4
5
[DEVICE]
ip_address = 10.8.20.1
mode = rfidprivacity = 0dev_type = 20Intento utilizar la clase siguiente en un ecript para poder modificar los parámetros pero no consigo hacerlo.
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
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Class for read and modify files with key value content.
Last versión:
http://lwp-l.com/s5436
Samples:
Read key for file with separation is "=" sample fileConfig content: # comment
key1=value1 code:from keyValueFile import KeyValueFile
kv=KeyValueFile("fileConfig", "=")
kv.getValue("key1") # return value1
Read key commented for file with separation is "=" and comment line started with "#"
sample fileConfig content: # comment
key1=value1 #key2=value2
code:from keyValueFile import KeyValueFile
kv=KeyValueFile("fileConfig", "=")
kv.getValue("key2", True) # return value2
Read key commented for file with separation is "=" and comment line started with ";"
sample fileConfig content:; comment
key1=value1 ;key2=value2 code:from keyValueFile import KeyValueFile
kv=KeyValueFile("fileConfig", "=", ";")
kv.getValue("key2", True) # return value2
Read key for file with separation is one space " " sample fileConfig content: # comment
key2 value2
code:from keyValueFile import KeyValueFile
kv=KeyValueFile("fileConfig", " ")
kv.getValue("key2") # return value2
Update value for file with separation is "=" sample fileConfig content: # comment
key1=value1 code:from keyValueFile import KeyValueFile
kv=KeyValueFile("fileConfig", "=")
kv.setValue("key1", "new value")
kv.save()
Get commented value for a file with separation is "=" and comment line started with ";"
sample fileConfig content:; comment
key1=value1 ;key2=value2 code:from keyValueFile import KeyValueFile
kv=KeyValueFile("fileConfig", "=", ";")
kv.getValue("key2") # return None
kv.getValue("key2", True) # return value2
Set commented for a key value pairs
sample fileConfig content:; comment
key1=value1 key2=value2 code:from keyValueFile import KeyValueFile
kv=KeyValueFile("fileConfig", "=", ";")
kv.setValue("key2", kv.getValue("key2"), True)
kv.save()
Remove commented for a key value pairs
sample fileConfig content:; comment
key1=value1 ;key2=value2 code:from keyValueFile import KeyValueFile
kv=KeyValueFile("fileConfig", "=", ";")
kv.setValue("key2", kv.getValue("key2", True))
kv.save()
Remove key value pairs from file
sample fileConfig content: # comment
key1=value1 key2=value2 code:from keyValueFile import KeyValueFile
kv=KeyValueFile("fileConfig")
kv.removeKey("key2") # remove the line key2=value2
kv.save()
"""
import os
from tempfile import mkstemp
from shutil import move
__ver__="0.1"
class KeyValueFile():
file=""
separationKeyValue=""
commentCharacterStart=""
keyValues={}
keyRemove=[]
def __init__(self, file="", separationKeyValue="=", commentCharacterStart="#"):
"""
Parameters:
file string - file to read and save
separation string - separation between key and value
"""
self.setFile(file)
self.separationKeyValue=separationKeyValue
self.commentCharacterStart=commentCharacterStart
def setFile(self, file, separationKeyValue="="):
"""
Function that receive a filename to update.
Parameters
string file
string separationKeyValue (default =)
Return
boolean
"""
if os.path.exists(file) and separationKeyValue:
self.file=file
self.separationKeyValue=separationKeyValue
return True
return False
def setValue(self, key, value="", comment=False):
"""
Function to save key value in a var for update or insert when save data.
Parameters:
string key
string value (optional)
boolean comment - define if the value has to be commented
Return:
boolean
"""
if not key:return False
if key in self.keyRemove:
self.keyRemove.remove(key)
self.keyValues[key.strip()]=[value.strip(), comment]
return True
def removeKey(self, key):
"""
Function to save key value for remove this line with key when save data.
Parameters:
string key
"""
if not key:return False
if key in self.keyValues:
del self.keyValues[key]
self.keyRemove.append(key)
return True
def getValue(self, key, commented=False):
"""
Function that find a key into file and return a value if finded key.
Parameters:
key string
commented boolean - define if search key in commented lines
Return:
string - value for a key or None
"""
with open(self.file, "r") as f:
for line in f:kv=line.split(self.separationKeyValue, 1)
# the line doesn't have a separation key value
if len(kv)==1:
continue
k,v=kv
k=k.strip()
v=v.strip()
k=k[1:].strip() if commented and k[0]==self.commentCharacterStart else k
if k==key:
return v
return None
def save(self):
"""
Function to save the content of vars in a file.
Return:
int - number of lines + added or updated - removed
"""
count=0if os.path.exists(self.file) and os.access(self.file, os.W_OK) and self.separationKeyValue:
fh, abs_path = mkstemp()
with os.fdopen(fh, 'w') as new_file:
with open(self.file, "r") as old_file:
for line in old_file:kv=line.split(self.separationKeyValue, 1)
if len(kv)==1:
# the line doesn't have a separation key value
new_file.write(line)
continue
k,v=kv
k=k.strip()
v=v.strip()
k=k[1:] if k[0]==self.commentCharacterStart else k
if k and k in self.keyRemove:
# this key if market as remove
count-=1
self.keyRemove.remove(k)
continue
if k and k in self.keyValues:
# this key will update from file
count+=1
if self.keyValues[k][1]==True:
# write as commented
new_file.write(self.commentCharacterStart+k+self.separationKeyValue+self.keyValues[k][0]+"\n")
else:new_file.write(k+self.separationKeyValue+self.keyValues[k][0]+"\n")
del self.keyValues[k]
else:new_file.write(line)
# Add elements not updated
for k,v in self.keyValues.items():
count+=1
new_file.write(k+self.separationKeyValue+v[0]+"\n")
self.keyValues={}
self.keyRemove=[]
# Remove original file
os.remove(self.file)
# Move new file
move(abs_path, self.file)
return count
Me podeis echar una mano...?
Gracia de antemano.
Valora esta pregunta
0
