10 examples of 'python replace string in file' in Python

14
def replace_in_file(filename, search, replace):
15
    # Read in the file
16
    filedata = None
17
    with open(filename, 'r') as file :
18
      filedata = file.read()
19
20
    # Replace the target string
21
    filedata = filedata.replace(search, replace)
22
23
    # Write the file out again
24
    with open(filename, 'w') as file:
25
      file.write(filedata)

27
def replace(file, pattern, subst):
28
    # Read contents from file as a single string
29
    file_handle = open(file, 'r')
30
    file_string = file_handle.read()
31
    file_handle.close()
32
33
    # Use RE package to allow for replacement (also allowing for (multiline) REGEX)
34
    file_string = (re.sub(pattern, subst, file_string))
35
36
    # Write contents to file.
37
    # Using mode 'w' truncates the file.
38
    file_handle = open(file, 'w')
39
    file_handle.write(file_string)
40
    file_handle.close()

5
def replace_in_file(file_path, search, replace):
6
    with open(file_path, "r") as handle:
7
        content = handle.read()
8
        if search not in content:
9
            raise Exception("Incorrect development version in conans/__init__.py")
10
    content = content.replace(search, replace)
11
    content = content.encode("utf-8")
12
    with open(file_path, "wb") as handle:
13
        handle.write(content)

64
def file_substitute(filename, search, replace):
65
    f = open(filename, 'r')
66
    file_data = f.read()
67
    f.close()
68
    new_data = file_data.replace(search, replace)
69
    f = open(filename, 'w')
70
    f.write(new_data)
71
    f.close()

3
def applyReplacesOnFile(fileName, replaces, write=True):
4
    with open(fileName) as f:
5
        content = f.read()
6
    
7
    for r in replaces:
8
        content = content.replace(r, replaces[r])    
9
    if write:    
10
        with open(fileName, "w") as f:
11
            f.write(content)
12
    else:
13
        return content

194
def replace(string, old, new):
195
    return string.replace(old, new)

291
def fileStringReplace(fn, src, dst):
292
  if MLABFileManager.exists(fn):
293
    lines = [];
294
    with open(fn, 'r') as f:
295
      for l in f:
296
        lines += [l.replace(src, dst)];
297
    with open(fn, 'w') as f:
298
      for l in lines:
299
        f.write(l);
300
  else :
301
    print "Error: could not open file for replacement, " + fn;

17
def replace_in_file(workspace, src_file_path, from_str, to_str):
18
  """Replace from_str with to_str in the name and content of the given file.
19
20
  If any edits were necessary, returns the new filename (which may be the same as the old filename).
21
  """
22
  from_bytes = from_str.encode('ascii')
23
  to_bytes = to_str.encode('ascii')
24
  data = read_file(os.path.join(workspace, src_file_path), binary_mode=True)
25
  if from_bytes not in data and from_str not in src_file_path:
26
    return None
27
28
  dst_file_path = src_file_path.replace(from_str, to_str)
29
  safe_file_dump(os.path.join(workspace, dst_file_path),
30
                 data.replace(from_bytes, to_bytes),
31
                 mode='wb')
32
  if src_file_path != dst_file_path:
33
    os.unlink(os.path.join(workspace, src_file_path))
34
  return dst_file_path

85
def replace_contents(file_path, regex, new_content):
86
    with open(file_path, 'r+') as f:
87
        content = f.read()
88
        content = regex.sub(new_content, content)
89
        f.seek(0)
90
        f.write(content)

189
def replace(data):
190
    left_angle = 'dsfw4rwfdfstg43'
191
    right_angle = '3dsdtgsgt43trfdf'
192
    data = data.replace('\<', left_angle).replace('\>', right_angle)
193
    # 正则匹配出 data 中所有 <> 中的变量，返回列表
194
    keys = re.findall(r'<(.*?)>', data)
195
    _vars = {}
196
197
    for k in keys:
198
        k = k.replace(left_angle, '<').replace(right_angle, '>')
199
        # 正则匹配出 k 中的 + - ** * // / % , ( ) 返回列表
200
        values = re.split(r'(\+|-|\*\*|\*|//|/|%|,|\(|\))', k)
201
        for v in values:
202
            #切片操作处理，正则匹配出 [] 中内容
203
            s = v.split('[', 1)
204
            index = ''
205
            if len(s) == 2:
206
                v = s[0]
207
                index = '[' + s[1]
208
209
            if v in g.var and v not in _vars:
210
                # 如果在 var 中是 list
211
                if isinstance(g.var[v], list) and not index:
212
                    # 是测试数据文件中的值，则 pop 第一个值
213
                    if len(g.var[v]) == 0:
214
                        raise Exception('The key:%s is no value in data csv' %v)
215
                    elif len(g.var[v]) == 1:
216
                        _vars[v] = g.var[v][0]
217
                        g.var['_last_'] = True
218
                    else:
219
                        _vars[v] = g.var[v].pop(0)
220
221
                else:
222
                    _vars[v] = g.var[v]
223
224
        try:
225
            value = eval(k, globals(), _vars)              
226
        except:
227
            value = '<' + k + '>'             
228
        
229
        if data == '<' + keys[0] + '>':
230
            data = value
231
        # 否则需要替换，此时变量强制转换为为字符串
232
        else:
233
            data = data.replace('<' + k + '>', str(value))
234
            data = data.replace(left_angle, '<').replace(right_angle, '>')
235
    return data