Python - reading text file delimited by semicolon, ploting chart using openpyxl - python-2.7

Question

I have copied the text file to excel sheet separating cells by ; delimiter.
I need to plot a chart using the same file which I achieved. Since all the values copied are type=str my chart gives me wrong points.
Please suggest to overcome this. Plot is should be made of int values
from datetime import date
from openpyxl import Workbook,load_workbook
from openpyxl.chart import (
LineChart,
Reference,
Series,
)
from openpyxl.chart.axis import DateAxis
excelfile = "C:\Users\lenovo\Desktop\how\openpychart.xlsx"
wb = Workbook()
ws = wb.active
f = open("C:\Users\lenovo\Desktop\sample.txt")
data = []
num = f.readlines()
for line in num:
line = line.split(";")
ws.append(line)
f.close()
wb.save(excelfile)
wb.close()
wb = load_workbook(excelfile, data_only=True)
ws = wb.active
c1 = LineChart()
c1.title = "Line Chart"
##c1.style = 13
c1.y_axis.title = 'Size'
c1.x_axis.title = 'Test Number'
data = Reference(ws, min_col=6, min_row=2, max_col=6, max_row=31)
series = Series(data, title='4th average')
c1.append(series)
data = Reference(ws, min_col=7, min_row=2, max_col=7, max_row=31)
series = Series(data, title='Defined Capacity')
c1.append(series)
##c1.add_data(data, titles_from_data=True)
# Style the lines
s1 = c1.series[0]
s1.marker.symbol = "triangle"
s1.marker.graphicalProperties.solidFill = "FF0000" # Marker filling
s1.marker.graphicalProperties.line.solidFill = "FF0000" # Marker outline
s1.graphicalProperties.line.noFill = True
s2 = c1.series[1]
s2.graphicalProperties.line.solidFill = "00AAAA"
s2.graphicalProperties.line.dashStyle = "sysDot"
s2.graphicalProperties.line.width = 100050 # width in EMUs
##s2 = c1.series[2]
##s2.smooth = True # Make the line smooth
ws.add_chart(c1, "A10")
##
##from copy import deepcopy
##stacked = deepcopy(c1)
##stacked.grouping = "stacked"
##stacked.title = "Stacked Line Chart"
##ws.add_chart(stacked, "A27")
##
##percent_stacked = deepcopy(c1)
##percent_stacked.grouping = "percentStacked"
##percent_stacked.title = "Percent Stacked Line Chart"
##ws.add_chart(percent_stacked, "A44")
##
### Chart with date axis
##c2 = LineChart()
##c2.title = "Date Axis"
##c2.style = 12
##c2.y_axis.title = "Size"
##c2.y_axis.crossAx = 500
##c2.x_axis = DateAxis(crossAx=100)
##c2.x_axis.number_format = 'd-mmm'
##c2.x_axis.majorTimeUnit = "days"
##c2.x_axis.title = "Date"
##
##c2.add_data(data, titles_from_data=True)
##dates = Reference(ws, min_col=1, min_row=2, max_row=7)
##c2.set_categories(dates)
##
##ws.add_chart(c2, "A61")
### setup and append the first series
##values = Reference(ws, (1, 1), (9, 1))
##series = Series(values, title="First series of values")
##chart.append(series)
##
### setup and append the second series
##values = Reference(ws, (1, 2), (9, 2))
##series = Series(values, title="Second series of values")
##chart.append(series)
##
##ws.add_chart(chart)
wb.save(excelfile)
wb.close()

Answer 1

I have modified below code in for loop and it worked.
f = open("C:\Users\lenovo\Desktop\sample.txt")
data = []
num = f.readlines()
for line in num:
line = line.split(";")
new_line=[]
for x in line:
if x.isdigit():
x=int(x)
new_line.append(x)
else:
new_line.append(x)
ws.append(new_line)
f.close()
wb.save(excelfile)
wb.close()
For each list,for each value check if its a digit, if yes converts to integer and store in another list.
Using x=map(int,x) didnt work since I have character values too.
I felt above is much more easy than using x=map(int,x) with try and Except
Thanks
Basha