3.2daydayup draw inferences from one instance: three days of fishing and two days of net learning

# daydayupQ5.py
#  Three days of fishing and two days of net learning 
# def Reserved words are used to define functions , Return one this time dayup value 
def dayUP(df):
    dayup = 1
    for i in range(365):
        if i % 3 in [1,2]:  # 120120120....
            dayup = dayup * (1 - 0.01)
        else:
            dayup = dayup * (1 + df)  #  Here is the custom variable 
    return dayup  #  Strictly indent , And for Statements are parallel structures   Give the return value 
dayfactor = 0.01
#dd = 1
A = pow(1+dayfactor, 365)
#while dayUP(df) < A:  #  Execute the above for loop ,NameError: name 'df' is not defined
#while dayUP(dd) < A:  #  Hard work during the working day is worth ：0.010
while dayUP(dayfactor) < A:
    dayfactor += 0.001
print(" Hard work during the working day is worth ：{:.3f}".format(dayfactor))