使用 python 将数据转换为 CSV

Question

我对 python 中的词典没有深入了解。但是，我有结构化文本数据 (ASCII)，我想将其转换为 CSV（以输入数据库或电子表格）。并非每行中的所有值都可用：

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一行中。但是，字段值中没有空格。如何将此类文本文件转换为 CSV 格式

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,

以另一种顺序获取列留作 reader 的练习。

使用 python 将数据转换为 CSV

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