擅长:python、mysql、java
<p><strong><code>applymap</code></strong>与<strong><code>lambda</code></strong></p>
<pre><code>df[['rpks', 'asks', 'pax']].applymap(lambda r: '0.0' if '-' in str(r) else str(r).replace(',', ''))
rpks asks pax
0 9.74 194.72 1752.48
1 19.47 82.74 700.85
2 0.0 360.16 3679.45
3 127.03 994.14 7306.93
4 53.54 612.75 5770.53
5 0.0 7.02 666.43
6 34.52 197.28 784.19
7 0.0 460.31 5466.80
8 0.0 108.63 1128.90
9 0.0 16.54 913.49
10 10.52 368.06 3054.90
11 93.93 784.55 5646.55
</code></pre>