请问我这个python里为什么运行不执行后面几句

所有分支都不满足条件吧...

not ==改成!=

帮你改好了，两个地方

elif not fish_record[25:27]=='乌龟':改成elif  fish_record[25:27]=='乌龟':

int(fish_record)改成int(fish_record[27]

fish_record='鲫鱼5条，鲤鱼8条，鲢鱼7条，草鱼2条，黑鱼6条，乌龟1只'
print(len(fish_record))
if fish_record[0:2]=='乌龟':
print('是乌龟吗?,是'+fish_record[0:2])
elif fish_record[5:7]=='乌龟':
print('是乌龟吗?,是'+fish_record[5:7])
elif fish_record[10:12]=='乌龟':
print('是乌龟吗?,是'+fish_record[10:12])
elif fish_record[15:17]=='乌龟':
print('是乌龟吗?,是'+fish_record[15:17])
elif fish_record[20:22]=='乌龟':
print('是乌龟吗?,是'+fish_record[20:22])
elif fish_record[25:27]=='乌龟':
if int(fish_record[27])/2==0:
print('找到乌龟了，是%d只，偶数'%(int(fish_record[27])))
else:
print('找到乌龟了，是%d只，奇数'%(int(fish_record[27])))