check duplicates pandas code example
Example 1: print duplicates elements in column pandas
mask = df.columnname.duplicated(keep=False)
print (df[mask])
Example 2: python - show repeted values in a column
df = df[df.duplicated(subset=['val1','val2'], keep=False)]
Example 3: how to check for duplicates in a column in python
boolean = df['Student'].duplicated().any() # True