Question

我正在尝试将一个单词的出现替换为另一个单词：

label = tf.constant([0.35, 0.5, 0.17, 0.14]) # just an example
uniform_random = tf.random_uniform([], 0, 1.0)

# Create a tensor with [1.0, 0.0, 0.0, 0.0] if uniform_random > 50%
# else it's only zeroes
inv = tf.pack([tf.round(uniform_random), 0.0, 0.0, 0.0])

label = tf.sub(inv, label)
label = tf.abs(label) # need abs because it inverted the other elements
# output will be either [0.35, 0.5, 0.17, 0.14] or [0.65, 0.5, 0.17, 0.14]

虽然这有效但word_list = { "ugh" : "disappointed"} tmp = ['laughing ugh'] for index, data in enumerate(tmp): for key, value in word_list.iteritems(): if key in data: tmp[index]=data.replace(key, word_list[key]) print tmp中ugh的出现也在输出中被替换：laughing

如何避免这种情况，使输出为ladisappointeding disappointed.？

Answer 1

在这种情况下，您可能需要考虑逐字替换。

示例：

word_list = { "ugh" : "disappointed"} tmp = ['laughing ugh'] for t in tmp: words = t.split() for i in range(len(words)): if words[i] in word_list.keys(): words[i] = word_list[words[i]] newline = " ".join(words) print(newline)

<强>输出：

laughing disappointed

逐步说明：

获取tmp list中的每个句子：

for t in tmp:

将句子分成words：

words = t.split()

检查word words中的word_list中是否有keys。如果是，请将其替换为value：

for i in range(len(words)): if words[i] in word_list.keys(): words[i] = word_list[words[i]]

重新加入被替换的单词并打印出结果：

newline = " ".join(words) print(newline)

Answer 2

您可以使用RegEx执行此操作：

>>> import re
>>> re.sub(r'\bugh\b', 'disappointed', 'laughing ugh')
'laughing disappointed'

\b代表单词边界。

Answer 3

使用re.sub：

for key, value in word_list.items():
    tmp = re.sub("\\b{}\\b".format(key), value, tmp[index])

Answer 4

word_list = { "ugh" : "disappointed", "123" : "lol"}
tmp = ['laughing 123 ugh']

for word in tmp:
    words = word.split()
for i in words[:]:
    if  i in word_list.keys():
    replace_value = word_list.get(i)
    words[words.index(i)] = replace_value
output = " ".join(words)
print output

此代码会将dict的每个键（因此要替换的单词）与该键的dict值（您想要替换它的单词）交换，并且具有多个值！

Output:
    laughing lol disappointed

希望有所帮助！

Answer 5

您可以使用正则表达式：

import re

for index, data in enumerate(tmp):
    for key, value in word_list.iteritems():
        if key in data:
            pattern = '\b' + key + '\b'
            data = re.sub(pattern, value, data)
            tmp[index] = data

附注：您需要data = ...行（以覆盖data变量），否则当word_list包含多个条目时，它将无法正常工作。

Answer 6

快速：

>>> [re.sub(r'\w+', lambda m: word_list.get(m.group(), m.group()), t) 
     for t in tmp]
['laughing disappointed']
>>>

非常快：

>>> [re.sub(r'\b(?:%s)\b' % '|'.join(word_list.keys()), lambda m: word_list.get(m.group(), m.group()), t) 
...  for t in tmp]
['laughing disappointed']
>>>

Python字符串替换

6 个答案: