Round each number in a Python pandas data frame by 2 decimals

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Since 0.17.0 version you can do .round(n)

df.round(2)
      0     1     2     3
0  0.06  0.67  0.77  0.71
1  0.80  0.56  0.97  0.15
2  0.03  0.59  0.11  0.95
3  0.33  0.19  0.46  0.92

df
          0         1         2         3
0  0.057116  0.669422  0.767117  0.708115
1  0.796867  0.557761  0.965837  0.147157
2  0.029647  0.593893  0.114066  0.950810
3  0.325707  0.193619  0.457812  0.920403

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