Dynamically filtering a pandas dataframe

Question

I am trying to filter a pandas data frame using thresholds for three columns

import pandas as pd
df = pd.DataFrame({\"A\" : [6, 2, 10, -5, 3],
                       


        

Answer 1

How I do this without creating a string and df.query:

limits_dic = {"A" : 0, "B" : 2, "C" : -1}
cond = None

# Build the conjunction one clause at a time 
for key, val in limits_dic.items():
    if cond is None:
        cond = df[key] > val
    else:
        cond = cond & (df[key] > val)

df.loc[cond]

    A  B  C
0   2  5  2
1  10  3  1
2   3  6  2

Note the hard coded (>, &) operators (since I wanted to follow your example exactly).