使用python将数据转换为CSV

Question

我并没有深入参与Python中的字典。但是，我有结构化文本数据（ASCII），我想将其转换为CSV（输入数据库或电子表格）。并非所有值都可用于每行：

name Smith city Boston country USA 
name Meier city Berlin ZIP 12345 country Germany 
name Grigoriy country Russia 

并非所有字段都在每行中。但是，字段值中不包含空格。我怎样才能在一个CSV的转换成文本文件一样

name, city, ZIP, country 
Smith, Boston, , USA 
Meier, Berlin, 12345, Germany 
Grigory, , , Russia 

Answer 1

试试这个：

d = """name Smith city Boston country USA 
name Meier city Berlin ZIP 12345 country Germany 
name Grigoriy country Russia""" 

keys = {}        # will collect all keys 
objs = []        # will collect all lines 
for line in d.split("\n"):    # split input by linebreak 
    ks = [x for x in line.split()[::2]] # even positions: 0, 2, 4, 6 
    vs = [x for x in line.split()[1::2]] # odd positions: 1, 3, 5, 7 
    objs.append(dict(zip(ks, vs)))  # turn line into dictionary 
    for key in ks: 
     keys[key] = True     # note all keys 

print(",".join(keys))     # print header row 
for obj in objs: 
    print(",".join([obj.get(k, "") for k in keys])) 

输出：

country,city,name,ZIP 
USA,Boston,Smith, 
Germany,Berlin,Meier,12345 
Russia,,Grigoriy, 

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