我使用re.sub
将ARB样式的名称替换为字符串中的GLSL样式的名称。现在我想另外将所有转换的匹配项存储为一组字符串。我可以在使用re.sub
的“template”语法时执行此操作吗?
代码如下:
# set of replacement rules
expl_table = [
(r'program.env\[(\d+)\]' , r'program_env_\1'),
(r'program.local\[(\d+)\]', r'program_local_\1'),
]
for props in expl_table:
(re_from, re_to) = props
# arg = re.sub(re_from, re_to, arg) # simple and good
def replace_func(m):
result = ??repl_template??(m, re_to) # where can I find it?
declarations.append(result) # want to save all replacements
return result
arg = re.sub(re_from, replace_func, arg)
我在source code中发现了类似
_subx
的东西,但它似乎是关闭的。似乎我得自己去实现它,尽管听起来很愚蠢。
最佳答案
您可以在使用re.finditer()
迭代字符串时更改字符串:
# set of replacement rules
expl_table = [
(r'program.env\[(\d+)\]' , r'program_env_dsdsds\1'),
(r'program.local\[(\d+)\]', r'program_local_\1'),
]
declarations = []
for props in expl_table:
(re_from, re_to) = props
offset = 0
for m in re.finditer(re_from, string):
sub = m.expand(re_to)
string = string[:m.start()+offset] + sub + string[m.end()+offset:]
offset = max(map(len, [sub, m.group(0)])) - min(map(len, [sub, m.group(0)]))
declarations.append(sub)
print(string)
或者,可以“升级”同一范围内的lambda函数。通常,不允许在lambda函数中使用多个语句,但是列表理解稍微绕过了这个约束:
for props in expl_table:
(re_from, re_to) = props
string = re.sub(re_from,
lambda m: [
(result, declarations.append(result))
for result in [m.expand(re_to)]
][0][0],
string)
print(string)
print(declarations)
关于python - re.sub将模板转换为函数,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/54566131/