Question

我需要一些帮助。我有以下两个清单：

sentences = ['The green monkey green age the blue egg','How many yellow green monkey"s are in the green forest']
color =['orange', 'green', 'yellow', 'violet', 'blue']

totals = []

for sent in sentences:
  print sent
  for sent in sentences:
      totals.add((sent, sum(sent.count(col) for col in color))

我的目标是计算句子中任何给定元素中颜色元素出现的次数。所以我的输出将包含每个句子元素和颜色元素的计数。任何有关这方面的帮助将非常感激。我是初学者，到目前为止享受python：）

Answer 1

您也可以尝试使用Counter：

color =['orange', 'green', 'yellow', 'violet', 'blue']
sentences = ['The green monkey age the blue egg', 'How many yellow monkey"s are in the green forest']
from collections import Counter

for line in sentences:
    print Counter([word for word in line.split() if word in color])

Answer 2

使用Counter可能是最好的Pythonic（和最短）方式，但字符串还附带了一个内置的count方法，您可以使用它：

color =['orange', 'green', 'yellow', 'violet', 'blue']
sentences = ['The green monkey age the blue egg', 'How many yellow monkey"s are in the green forest']

for sent in sentences:
  print sent
  for col in color:
    print "", col, sent.count(col)

输出：

The green monkey age the blue egg
 orange 0
 green 1
 yellow 0
 violet 0
 blue 1
How many yellow monkey"s are in the green forest
 orange 0
 green 1
 yellow 1
 violet 0
 blue 0

编辑：

如果您只想在句子中的总颜色数旁边显示句子，请将最后一个for循环替换为总和list comprehension：

for sent in sentences:
  print sent, sum(sent.count(col) for col in color)

Answer 3

最简单的方法是在每个句子中查找每种颜色：

for sentence in sentences:
    count = 0
    for color in colors:
        for word in sentence.split(' '):
            if word == color:
                count + = 1
    print count

Answer 4

您可以尝试这样的事情：

print [(s, sum(s.count(c) for c in colors)) for s in sentences]

输出

[('The green monkey age the blue egg', 2), 
 ('How many yellow monkey"s are in the green forest', 2)]

如果您想使用问题中列出的代码，则会出现3个错误：

你只需要循环一遍句子。
您需要将add替换为append。
您在添加/追加功能的末尾缺少一个括号。

以下固定代码：

sentences = ['The green monkey green age the blue egg','How many yellow green monkey"s are in the green forest']
color =['orange', 'green', 'yellow', 'violet', 'blue']

totals = []

for sent in sentences:
    totals.append((sent, sum(sent.count(col) for col in color)))

print totals

while循环计数器比较两个列表

4 个答案:

编辑：

输出