pandas dataframe output need to be a string instead of a list - python-3.x

Question

I have a requirement that the result value should be a string. But when I calculate the maximum value of dataframe it gives the result as a list.
import pandas as pd
def answer_one():
df_copy = [df['# Summer'].idxmax()]
return (df_copy)
df = pd.read_csv('olympics.csv', index_col=0, skiprows=1)
for col in df.columns:
if col[:2]=='01':
df.rename(columns={col:'Gold'+col[4:]}, inplace=True)
if col[:2]=='02':
df.rename(columns={col:'Silver'+col[4:]}, inplace=True)
if col[:2]=='03':
df.rename(columns={col:'Bronze'+col[4:]}, inplace=True)
if col[:1]=='№':
df.rename(columns={col:'#'+col[1:]}, inplace=True)
names_ids = df.index.str.split('\s\(')
df.index = names_ids.str[0] # the [0] element is the country name (new index)
df['ID'] = names_ids.str[1].str[:3] # the [1] element is the abbreviation or ID (take first 3 characters from that)
df = df.drop('Totals')
df.head()
answer_one()
But here the answer_one() will give me a List as an output and not a string. Can someone help me know how this came be converted to a string or how can I get the answer directly from dataframe as a string. I don't want to convert the list to a string using str(df_copy).

Answer 1

Your first solution would be as #juanpa.arrivillaga put it: To not wrap it. Your function becomes:
def answer_one():
df_copy = df['# Summer'].idxmax()
return (df_copy)
>>> 1
Another thing that you might not be expecting but idxmax() will return the index of the max, perhaps you want to do:
def answer_one():
df_copy = df['# Summer'].max()
return (df_copy)
>>> 30
Since you don't want to do str(df_copy) you can do df_copy.astype(str) instead.
Here is how I would write your function:
def get_max_as_string(data, column_name):
""" Return Max Value from a column as a string."""
return data[column_name].max().astype(str)
get_max_as_string(df, '# Summer')
>>> '30'