to get number of elements in a dataframe, code example
Example 1: get number of rows pandas
number_of_rows = len(df)
Example 2: python - count total numeber of row in a dataframe
# Option 1
df.A.count()
# Option 2
df['A'].count()
# Option 3
number_of_rows = len(df)
# Option 4
df.count()