python - 替换在 str 中工作但在对象 dtype 中不起作用
问题描述
ab = '1 234'
ab = ab.replace(" ", "")
ab
'1234'
它很容易replace()
摆脱空白,但是当我有一列熊猫数据框时;
gbpusd['Profit'] = gbpusd['Profit'].replace(" ", "")
gbpusd['Profit'].head()
3 7 000.00
4 6 552.00
11 4 680.00
14 3 250.00
24 1 700.00
Name: Profit, dtype: object
但它没有用,谷歌搜索了很多次,但没有解决方案......
gbpusd['Profit'].sum() TypeError: can only concatenate str (not "int") to str
然后,由于空白仍然在这里,无法进行进一步分析,就像sum()
事情比我想象的要难:原始数据是
gbpusd.head()
Ticket Open Time Type Volume Item Price S / L T / P Close Time Price.1 Commission Taxes Swap Profit
84 50204109.0 2019.10.24 09:56:32 buy 0.5 gbpusd 1.29148 0.0 0.0 2019.10.24 09:57:48 1.29179 0 0.0 0.0 15.5
85 50205025.0 2019.10.24 10:10:13 buy 0.5 gbpusd 1.29328 0.0 0.0 2019.10.24 15:57:02 1.29181 0 0.0 0.0 -73.5
86 50207371.0 2019.10.24 10:34:10 buy 0.5 gbpusd 1.29236 0.0 0.0 2019.10.24 15:57:18 1.29197 0 0.0 0.0 -19.5
87 50207747.0 2019.10.24 10:40:32 buy 0.5 gbpusd 1.29151 0.0 0.0 2019.10.24 15:57:24 1.29223 0 0.0 0.0 36
88 50212252.0 2019.10.24 11:47:14 buy 1.5 gbpusd 1.28894 0.0 0.0 2019.10.24 15:57:12 1.29181 0 0.0 0.0 430.5
当我这样做的时候
gbpusd['Profit'] = gbpusd['Profit'].str.replace(" ", "")
gbpusd['Profit']
84 NaN
85 NaN
86 NaN
87 NaN
88 NaN
89 NaN
90 NaN
91 NaN
92 NaN
93 NaN
94 NaN
95 NaN
96 NaN
97 NaN
98 NaN
99 NaN
100 NaN
101 NaN
102 NaN
103 NaN
104 NaN
105 NaN
106 NaN
107 NaN
108 NaN
109 NaN
110 NaN
111 NaN
112 NaN
113 NaN
...
117 4680.00
118 NaN
119 NaN
120 NaN
121 NaN
122 NaN
123 NaN
124 NaN
125 NaN
126 NaN
127 NaN
128 NaN
129 NaN
130 -2279.00
131 -2217.00
132 -2037.00
133 -5379.00
134 -1620.00
135 -7154.00
136 -4160.00
137 1144.00
138 NaN
139 NaN
140 NaN
141 -1920.00
142 7000.00
143 3250.00
144 NaN
145 1700.00
146 NaN
Name: Profit, Length: 63, dtype: object
空格被替换了,但是一些没有空格的数据现在是NaN......有人可能有同样的问题......
解决方案
也需要使用str
gbpusdprofit = gbpusd['Profit'].str.replace(" ", "")
输出:
0 7000.00
1 6552.00
2 4680.00
3 3250.00
4 1700.00
Name: Profit, dtype: object
总和:
gbpusd['Profit'].str.replace(" ", "").astype('float').sum()
结果:
23182.0
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