Try/Exept prints only ones

[deanhystad]

I am confused. Your second post with two exception handlers made it look like you are wondering why the exception handler does not always print both print statements. Do you understand now why in your original post the second print statement was skipped if the first print statement raised an error?

This last post sounds like you are wondering why you only see one error message from the log file when there may be many. This is because you only print messages once per log file. The print statements are outside the for loop that scans the log file.

Here is a shorter example I used to scan a file of baseball world series teams. I want to count the number of times the Milwaukee anybodies played in the WS and how many times the Chicago White Sox played in the WS.

import os

t0 = 'Milwaukee'
t1 = 'White Sox'
with open(os.path.join(os.getcwd(), 'debug.txt')) as f: 
    t0list=[]
    t1list=[]     
    for line in f :
        if t0 in line:
            t0list.append(line)
         
        elif t1 in line:
            t1list.append(line)
             
    if t0list:
        print(f'{t0} count -- {len(t0list)} --->>>  {t0list[-1]}')
    if t1list:
        print(f'{t1} count -- {len(t1list)} --->>>  {t1list[-1]}')

Output:
Milwaukee count -- 3 --->>>  1982	St. Louis Cardinals (NL)	Milwaukee Brewers (AL)	4–3

White Sox count -- 5 --->>>  2005	Chicago White Sox (AL)	Houston Astros (NL)	4–0

Even though Milwaukee has been in the WS 3 times, the program only printed the last time against St Louis in 1982. The same thing happened with the White Sox, only printing their last time, a win of Houston in 2005.

If this is the problem you are having, having multiple errors but only seeing one error printed, the problem is where the print statements are. In the example below I print each match as it is identified.

import os

t0 = 'Milwaukee'
t1 = 'White Sox'
with open(os.path.join(os.getcwd(), 'debug.txt')) as f: 
    t0cnt = 0
    t1cnt = 0    
    for line in f :
        if t0 in line:
            t0cnt+=1
            print(f'{t0cnt} {line.strip()}')
         
        elif t1 in line:
            t1cnt+=1
            print(f'{t1cnt} {line.strip()}')

Output:
1 1906	Chicago White Sox (AL)	Chicago Cubs (NL)	4–2
2 1917	Chicago White Sox (AL)	New York Giants (NL)	4–2
3 1919	Cincinnati Reds (NL)	Chicago White Sox (AL)	5–3
1 1957	Milwaukee Braves (NL)	New York Yankees (AL)	4–3
2 1958	New York Yankees (AL)	Milwaukee Braves (NL)	4–3
4 1959	Los Angeles Dodgers (NL)	Chicago White Sox (AL)	4–2
3 1982	St. Louis Cardinals (NL)	Milwaukee Brewers (AL)	4–3
5 2005	Chicago White Sox (AL)	Houston Astros (NL)	4–0

I could also save the matches in a list as before and then print out all the items in the list.

import os

t0 = 'Milwaukee'
t1 = 'White Sox'
with open(os.path.join(os.getcwd(), 'debug.txt')) as f: 
    t0list=[]  
    t1list=[]   
    for line in f :
        if t0 in line:
            t0list.append(line)
         
        elif t1 in line:
            t1list.append(line)

    print(f'{t0} World Series Appearances = {len(t0list)}')
    for line in t0list:
        print(f'{line.strip()}')

    print(f'\n{t1} World Series Appearances = {len(t1list)}')
    for line in t1list:
        print(f'{line.strip()}')

Output:
Milwaukee World Series Appearances = 3
1957	Milwaukee Braves (NL)	New York Yankees (AL)	4–3
1958	New York Yankees (AL)	Milwaukee Braves (NL)	4–3
1982	St. Louis Cardinals (NL)	Milwaukee Brewers (AL)	4–3

White Sox World Series Appearances = 5
1906	Chicago White Sox (AL)	Chicago Cubs (NL)	4–2
1917	Chicago White Sox (AL)	New York Giants (NL)	4–2
1919	Cincinnati Reds (NL)	Chicago White Sox (AL)	5–3
1959	Los Angeles Dodgers (NL)	Chicago White Sox (AL)	4–2
2005	Chicago White Sox (AL)	Houston Astros (NL)	4–0

Either way if you want more than one message printed you need the print statement inside a for loop. For error messages in a log file I would print the messages as they occur and then maybe a count at the end of the file.