Pandas: Clean object column with mixed data of a given DataFrame using regular expression
Pandas: DataFrame Exercise-76 with Solution
Write a Pandas program to clean object column with mixed data of a given DataFrame using regular expression.
Sample Solution :
Python Code :
import pandas as pd
d = {"agent": ["a001", "a002", "a003", "a003", "a004"], "purchase":[4500.00, 7500.00, "$3000.25", "$1250.35", "9000.00"]}
df = pd.DataFrame(d)
print("Original dataframe:")
print(df)
print("\nData Types:")
print(df["purchase"].apply(type))
df["purchase"] = df["purchase"].replace("[$,]", "", regex = True).astype("float")
print("\nNew Data Types:")
print(df["purchase"].apply(type))
Sample Output:
Original dataframe: agent purchase 0 a001 4500 1 a002 7500 2 a003 $3000.25 3 a003 $1250.35 4 a004 9000.00 Data Types: 0 <class 'float'> 1 <class 'float'> 2 <class 'str'> 3 <class 'str'> 4 <class 'str'> Name: purchase, dtype: object New Data Types: 0 <class 'float'> 1 <class 'float'> 2 <class 'float'> 3 <class 'float'> 4 <class 'float'> Name: purchase, dtype: object
Python-Pandas Code Editor:
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Find current directory and file's directory:
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To get the current working directory use
import os cwd = os.getcwd()
Documentation references for the modules, constants and functions used above:
- The os and os.path modules.
- The __file__ constant
- os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
- os.path.dirname(path) (returns "the directory name of pathname path")
- os.getcwd() (returns "a string representing the current working directory")
- os.chdir(path) ("change the current working directory to path")
Ref: https://bit.ly/3fy0R6m
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