将统一字符串转换为字典

Question

我正在寻找转换字符串数据的方法，如下所示：

"Kyiv, region A, 123\nKyiv, region B, 456\nKyiv, region C, 789\nPoltava, region D, 321\nPoltava, region E, 876\nPoltava, region F, 654"

到 'dict' 有两个键

{'city':'Kiev', 'population': 123}

我可以将原始字符串的子字符串转换为以下格式的字符串列表：

[['Kyiv', 'region A', 123'], ['Kyiv', 'region B', '456'],] ...

但无法继续进行。

有人可以帮我解析这个字符串吗？

这是我目前的代码：

dic_city = {}

cities = []
population = []

cities = [a.split(',') for a in s.split('\n')]

print(cities)

Answer 1

用换行符分割数据得到每个条目，然后用逗号+space分割得到每个条目的城市名称和人口：

entries = data.split("\n")
result = []
for entry in entries:
    city, _, pop = entry.split(", ")
    result.append(dict(city=city, population=population))
    
print(result)

这输出：

[
 {'city': 'Kyiv', 'population': '123'},
 {'city': 'Kyiv', 'population': '456'},
 {'city': 'Kyiv', 'population': '789'},
 {'city': 'Poltava', 'population': '321'},
 {'city': 'Poltava', 'population': '876'},
 {'city': 'Poltava', 'population': '654'}
]

Answer 2

txt = "Kyiv, region A, 123\nKyiv, region B, 456\nKyiv, region C, 789\nPoltava, region D, 321\nPoltava, region E, 876\nPoltava, region F, 654"

d = {}
for x in txt.splitlines():
  city = x.split(',')[0]
  if d.get(city):
    d[city] += int(x.split(',')[2]) # same city then add population
  else:
    d[city] = int(x.split(',')[2]) # different city add new key to dictionary

print(d)

输出-

{'Kyiv': 1368, 'Poltava': 1851}

Answer 3

试试这个

# split into nested lists
aux = [x.split(', ') for x in s.split('\n')]
# build a list of dictionaries
res = [{'city':c, 'population': int(p)} for c, _, p in aux]
res

与理解相同的代码

s = "Kyiv, region A, 123\nKyiv, region B, 456\nKyiv, region C, 789\nPoltava, region D, 321\nPoltava, region E, 876\nPoltava, region F, 654"
# create a dictionary in loop
[{'city':c, 'population': int(p)} for c, _, p in (x.split(', ') for x in s.split('\n'))]

#[{'city': 'Kyiv', 'population': 123},
# {'city': 'Kyiv', 'population': 456},
# {'city': 'Kyiv', 'population': 789},
# {'city': 'Poltava', 'population': 321},
# {'city': 'Poltava', 'population': 876},
# {'city': 'Poltava', 'population': 654}]

将统一字符串转换为字典

Convert a unified string to dictionary

python

string

dictionary

list