在
Python中是否有类似的机制,-b对bash有效果？
以下是此模式下bash的一些示例输出：
- + for src in cpfs.c log.c popcnt.c ssse3_popcount.c blkcache.c context.c types.c device.c
- ++ my_mktemp blkcache.c.o
- +++ mktemp -t blkcache.c.o.2160.XXX
- ++ p=/tmp/blkcache.c.o.2160.IKA
- ++ test 0 -eq 0
- ++ echo /tmp/blkcache.c.o.2160.IKA
- + obj=/tmp/blkcache.c.o.2160.IKA
解决方法
也许使用
sys.settrace：
使用traceit()打开跟踪,使用traceit(False)关闭跟踪.
- import sys
- import linecache
- def _traceit(frame,event,arg):
- '''
- http://www.dalkescientific.com/writings/diary/archive/2005/04/20/tracing_python_code.html
- '''
- if event == "line":
- lineno = frame.f_lineno
- filename = frame.f_globals["__file__"]
- if (filename.endswith(".pyc") or
- filename.endswith(".pyo")):
- filename = filename[:-1]
- name = frame.f_globals["__name__"]
- line = linecache.getline(filename,lineno)
- print "%s # %s:%s" % (line.rstrip(),name,lineno,)
- return _traceit
- def _passit(frame,arg):
- return _passit
- def traceit(on=True):
- if on: sys.settrace(_traceit)
- else: sys.settrace(_passit)
- def mktemp(src):
- pass
- def my_mktemp(src):
- mktemp(src)
- p=src
- traceit()
- for src in ('cpfs.c','log.c',):
- my_mktemp(src)
- traceit(False)
产量
- mktemp(src) # __main__:33
- pass # __main__:30
- p=src # __main__:34
- mktemp(src) # __main__:33
- pass # __main__:30
- p=src # __main__:34
- if on: sys.settrace(_traceit) # __main__:26
- else: sys.settrace(_passit) # __main__:27