[英]How to replace strings in list from a dictionary with all possible combinations
I want to replace a string named test1
which is listed in lst using a dictionary named gRep1Map
.我想使用名为gRep1Map
的字典替换 lst 中列出的名为test1
的字符串。 It needs to return all possible combinations using the characters in gRep1Map
.它需要使用gRep1Map
中的字符返回所有可能的组合。 I get an output, but not the one i want to.我得到了 output,但不是我想要的。 Can't really seem to find a way how to achieve this.似乎无法真正找到实现这一目标的方法。
Here is my code.这是我的代码。
text = "Test1"
#Create dictionary
gReplMap = { 'a': '@', 'e': '3', 'i': '1', 'o': '0', 't': '+',
'A': '@', 'E': '3', 'I': '1', 'O': '0', 'T': '+',
}
lst = []
for old, new in gReplMap.items():
text = text.replace(old, new)
lst.append(text)
print(lst)
The output is like below. output 如下所示。
['Test1']
['Test1', 'T3st1']
['Test1', 'T3st1', 'T3st1']
['Test1', 'T3st1', 'T3st1', 'T3st1']
['Test1', 'T3st1', 'T3st1', 'T3st1', 'T3s+1']
['Test1', 'T3st1', 'T3st1', 'T3st1', 'T3s+1', 'T3s+1']
['Test1', 'T3st1', 'T3st1', 'T3st1', 'T3s+1', 'T3s+1', 'T3s+1']
['Test1', 'T3st1', 'T3st1', 'T3st1', 'T3s+1', 'T3s+1', 'T3s+1', 'T3s+1']
['Test1', 'T3st1', 'T3st1', 'T3st1', 'T3s+1', 'T3s+1', 'T3s+1', 'T3s+1', 'T3s+1']
['Test1', 'T3st1', 'T3st1', 'T3st1', 'T3s+1', 'T3s+1', 'T3s+1', 'T3s+1', 'T3s+1', '+3s+1']
But i want it to be like this.但我希望它是这样的。
['test1', 'tes+1', 't3st1', 't3s+1', '+est1', '+es+1', '+3st1', '+3s+1']
Anyone who could help?有谁能帮忙吗?
You should not be iterating through the dictionary but through the letters of the text.您不应该遍历字典,而是遍历文本的字母。 Here is a solution that doesn't use itertools.这是一个不使用 itertools 的解决方案。
text = "Test1"
gReplMap = { 'a': '@', 'e': '3', 'i': '1', 'o': '0', 't': '+',
'A': '@', 'E': '3', 'I': '1', 'O': '0', 'T': '+'}
lst = [text]
#Iterate through each letter in each word in lst and update the lst
for string in lst:
for letter in string:
if letter in gReplMap:
new_string = string.replace(letter, gReplMap[letter])
if new_string not in lst:
lst.append(new_string)
print(lst)
(a rare case of usefulness of reduce
...) ( reduce
有用的罕见案例......)
from itertools import combinations
from functools import reduce
out = {
reduce(lambda x, y: x.replace(y[0], y[1]), repls, text)
for n in range(len(gReplMap) + 1)
for repls in combinations(gReplMap.items(), n)
}
Produces:生产:
>>> out
{'+3s+1', '+3st1', '+es+1', '+est1', 'T3s+1', 'T3st1', 'Tes+1', 'Test1'}
If you prefer to see the distinct values in the order they were generated, use a dict
(which has insertion order) and make a list of it:如果您希望按生成顺序查看不同的值,请使用dict
(具有插入顺序)并列出它:
out = list({
reduce(lambda x, y: x.replace(y[0], y[1]), repls, text): 1
for n in range(len(gReplMap) + 1)
for repls in combinations(gReplMap.items(), n)
})
Then:然后:
>>> out
['Test1', 'T3st1', 'Tes+1', '+est1', 'T3s+1', '+3st1', '+es+1', '+3s+1']
Note: in the desired result of your original question, all the variants of 'test1'
seem lowercase, but neither your sample code or the text of the question seems to specify that.注意:在您的原始问题的预期结果中, 'test1'
所有变体似乎都是小写的,但您的示例代码或问题文本似乎都没有指定这一点。 Of course, use .lower()
after reduce if that's what you want.当然,如果你想要的话,在 reduce 之后使用.lower()
。
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