Create a variable having in its name another variable (python)

Question

I’m doing a job in college that consists of analyzing data from covid-19 (through an excel spreadsheet). However one of the questions that my prof. asks is that with indication of a given week the program should provide for this week information X and as you know it has been more than 40 weeks since the beginning of the covid so if I keep creating subtypes for each week and for each column of approximately 170 lines of code only of subtypes, so I tried to give a variable having in its name another variable, unfortunately I did not succeed and I would like your help.

import xlrd
a=xlrd.open_workbook("covid.xlsx")
b=a.sheet_by_name("dados")
x=b.col_values(2)

i=int(input("Qual o valor de i?"))
if i>0 and i<5:
    _0imar=x[i+(7(i-1)):i+(7*i-(i-1))]
    print(_0imar)
if i>=5 and i<10:
    _0iabr=x[i+(7(i-1)):i+(7*i-(i-1))]
#Restante dos meses

<>:11: SyntaxWarning: 'int' object is not callable;perhaps you missed a comma?
<>:14: SyntaxWarning: 'int' object is not callable; perhaps you missed a comma?
<>:11: SyntaxWarning: 'int' object is not callable; perhaps you missed a comma?
<>:14: SyntaxWarning: 'int' object is not callable; perhaps you missed a comma?
Qual o valor de i?2
<ipython-input-65-dc2ab15c45d9>:11: SyntaxWarning: 'int' object is not callable;perhaps you missed a
comma?
      _0imar=x[i+(7(i-1)):i+(7*i-(i-1))]
    ---------------------------------------------------------------------------
    TypeError                                 Traceback (most recent call last)
    <ipython-input-65-dc2ab15c45d9> in <module>
          9 i=int(input("Qual o valor de i?"))
         10 if i>0 and i<5:
    ---> 11     _0imar=x[i+(7(i-1)):i+(7*i-(i-1))]
         12     print(_0imar)
         13 if i>=5 and i<10:
    
TypeError: 'int' object is not callable

Thank you.