I'm using flask and getting error at set_values. I'm reading the input from html and passing it to the code
@app.route('/home', methods=['POST'])
def first():
source = request.files['first']
destination = request.files['second']
df = pd.read_csv(source)
df1 = pd.read_csv(destination)
val1 = int(request.form['val1'])
val2 = int(request.form['val2'])
val3 = int(request.form['val3'])
target = request.form['str']
df2 = df[df.columns[val2]]
count = 0
for j in df[df.columns[val1]]:
x = df1.loc[df1[df1.columns[val3]] == j].index.values
for i in x:
df1.set_value(i, target, df2[count])
count = count + 1
df1.to_csv('result.csv', index=False)
1 Answer
Check your pandas version.
df.set_value() is deprecated since pandas version 0.21.0
Instead use df.at
import pandas as pd
df = pd.DataFrame({"A":[1, 5, 3, 4, 2],
"B":[3, 2, 4, 3, 4],
"C":[2, 2, 7, 3, 4],
"D":[4, 3, 6, 12, 7]})
df.at[2,'B']=100
A B C D
0 1 3 2 4
1 5 2 2 3
2 3 100 7 6
3 4 3 3 12
4 2 4 4 7
