python获取异常信息exc_info和print_exc的使用

while True:
    try:
        ins=input('请输入:')
    except EOFError as e:
        # except 代码块
        break
    else:
        print('你输入的是：',ins)

>>> import traceback
>>> while True:
    try:
        ins=input('请输入:')
    except EOFError as e:
        # 通过 Ctrl+D 或 Ctrl+Z 触发 EOFError
        print('遇到 Ctrl+D 或 Ctrl+Z，退出输入')
        print(traceback.print_exc())
        break
    else:
        print('你输入的是：',ins)

请输入:梯阅线条
你输入的是： 梯阅线条
请输入:
遇到 Ctrl+D 或 Ctrl+Z，退出输入
Traceback (most recent call last):
  File "<pyshell#58>", line 3, in <module>
EOFError: EOF when reading a line
None

class FoundByExc(Exception):pass
def search_by_exc(strlist,target):
    if True:
        raise FoundByExc("xxx")
    else:
        return "xxx"

>>> class FoundByExc(Exception):pass

>>> def search_by_exc(strlist,target):
    for s in strlist:
        if s == target:
            raise FoundByExc("在{}找到'{}'".format(strlist,target))
        else:
            return "在{}未找到'{}'".format(strlist,target)

        
>>> def test_searchbyexc(strlist,target):
    try:
        sbe=search_by_exc(strlist,target)
    except FoundByExc as fbe:
        print(fbe)
    else:
        print(sbe)

>>> strlist=['梯阅线条','tyxt.work','9555']
>>> target1='梯阅线条';target2='tyxt'
>>> test_searchbyexc(strlist,target1)
在['梯阅线条', 'tyxt.work', '9555']找到'梯阅线条'
>>> test_searchbyexc(strlist,target2)
在['梯阅线条', 'tyxt.work', '9555']未找到'tyxt'

import sys
sys.exc_info()

>>> try:
    1+[]
except:
    print(sys.exc_info())

    
(<class 'TypeError'>, TypeError("unsupported operand type(s) for +: 'int' and 'list'"), <traceback object at 0x03EFEE40>)

import traceback
try:
    # try 代码块
except xxx:
    # except 代码块
    traceback.print_exc()

>>> import traceback
>>> try:
    1+[]
except:
    traceback.print_exc()

    
Traceback (most recent call last):
  File "<pyshell#79>", line 2, in <module>
TypeError: unsupported operand type(s) for +: 'int' and 'list'