Slicing String cell by cell

[Vigneshkumarsakthivel]

Hi I am absolute beginner. I have a problem in slicing string in a excel file using python.
My excel file contains the following info:

Output:
ordercode	 quantity
PMC11-AA1L1FAVWJA	10
PMC21-AA1A1CBVXJA	2
PMP11-AA1L1FAWJJ	11
PMP21-AA1A1FBWJJ	4
PMP23-AA1A1FA3EJ+JA	1
PTP31B-AA3D1HGBVXJ	4
PTC31B-AA3D1CGBWBJA	8
PTP33B-AA3D1HGB1JJ	1

I want to slice the string in column "ordercode" based on whether it is "PMC11"/"PMC21"/"PMP21"/"PMP11"/"PMP23"/PTP31B/PTP33B/PTC31B" at different position and save it in new column "pressurerange".
in excel i have used the below code and it worked fine:

Output:
=IF(OR(ISNUMBER(SEARCH("PMC11",A2)),ISNUMBER(SEARCH("PMC21",A2)),ISNUMBER(SEARCH("PMP11",A2)),ISNUMBER(SEARCH("PMP21",A2)),ISNUMBER(SEARCH("PMP23",A2))),MID(A2,11,2),MID(A2,12,2))

but in python i used the below coding it didnt work properly.

import pandas as pd
#Assigning the worksheet to file
file="Stratification_worksheet.xlsx"
#Loading the spreadsheet 
data= pd.ExcelFile(file)
#sheetname
print(data.sheet_names)
#loading the sheetname to df1
df=data.parse("Auftrag")
print(df)

#creating a new column preessurerange and slicing the pressure range from order code

for index,row in df.iterrows():
    if "PMC11" in df.loc[index,"ordercode"]:
        df["pressurerange"]=df["ordercode"].str.slice(10,12)
    elif "PMC21" in df.loc[index,"ordercode"]:
        df["pressurerange"]=df["ordercode"].str.slice(10,12)
    elif "PMP11" in df.loc[index,"ordercode"]:
        df["pressurerange"]=df["ordercode"].str.slice(10,12)
    elif "PMP21" in df.loc[index,"ordercode"]:
        df["pressurerange"]=df["ordercode"].str.slice(10,12)
    elif "PMP23" in df.loc[index,"ordercode"]:
        df["pressurerange"]=df["ordercode"].str.slice(10,12)
    elif "PTP31B" in df.loc[index,"ordercode"]:
        df["pressurerange"]=df["ordercode"].str.slice(11,13)
    elif "PTP33B" in df.loc[index,"ordercode"]:
        df["pressurerange"]=df["ordercode"].str.slice(11,13)
    elif "PTC31B" in df.loc[index,"ordercode"]:
        df["pressurerange"]=df["ordercode"].str.slice(11,13)
    else:
        df["pressurerange"]="NONE"
    print(df.loc[:,["pressurerange"]])
    break

Here what it does is it checked the first IF condition and it sliced the string at the position (10,12) for all the column.

I know I have done mistake df["pressurerange"]=df["ordercode"].str.slice(10,12) here. but i dont know what is the exact coding to use.

Kindly help.