调递归用bdb不用自己print

 

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import bdb
import linecache
class Cdb(bdb.Bdb):
    def __init__(m, skip=None):
        print('''<html><style>
        *{font: 10pt "Source Code Pro", Hack, mono}
        b{color:black}
        i{color:green}
        </style><pre>''')
        bdb.Bdb.__init__(m, skip)
        m.level = m.cnt = 0
        m.ns = set(); m.ns.add('cdb'); m.ns.add('Cdb'); m.ns.add('bdb'); m.ns.add('linecache')
    def __del__(m): print('</pre>')
    def ignore(m, name): m.ns.add(name)
    def user_call(m, f, arg_list): m.level += 1; print('\n' if m.cnt > 1 else '', end='')
    def user_line(m, f): 
        def sd(m, dic): return str({k:v for (k,v) in dic.items() if not k.startswith('_') and not k in m.ns})
        m.cnt += 1
        if m.cnt == 1: return
        fn = m.canonic(f.f_code.co_filename)
        d = '<i>'+sd(m, f.f_globals)+sd(m, f.f_locals)+'</i>'
        c = linecache.getline(fn, f.f_lineno).rstrip('\n').lstrip(' \t')
        print(m.level, m.level*' ', d.ljust(40), '<b>'+c+'</b>')
    def user_return(m, frame, ret_val): m.level -= 1
    def user_exception(frame, exc_info): pass
    def do_clear(m, arg): pass

if __name__ == '__main__':
    m = 0
    def fn(n):
        if n == 0: return 1
        x = 1 << (n + m)
        x += fn(n - 1)
        return x
    from cdb import Cdb
    cdb = Cdb(); cdb.ignore('fn'); cdb.run('fn(3)')
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The trace module allows you to trace program execution, generate annotated statement coverage listings, print caller/callee relationships and list functions executed during a program run. It can be used in another program or from the command line. 我真是闲得蛋疼。在Windows 10的cmd里彩色print的版本:

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# The bdb module handles basic debugger functions, like setting breakpoints or managing execution via the debugger.
# The class bdb.Bdb() acts as a generic Python debugger base class. It takes care of the details of the trace facility;
# a derived class should implement user interaction. The standard debugger class (pdb.Pdb) is an example.
import bdb
import linecache
from cmdcolor import Color as C
O = 'rgb'

class Cdb(bdb.Bdb):
    def __init__(m, skip=None): bdb.Bdb.__init__(m, skip); m.framecnt = 0; m.ns = set(); m.ns.add('cdb'); m.ns.add('Cdb')
    
    def ignore(m, name): m.ns.add(name)
    
    def pr_lines(m, f):
        def sl(m, obj): return [x for x in dir(obj) if not x.startswith('_')] # short list
        def sd(m, dic): return {k:v for (k,v) in dic.items() if not k.startswith('_') and not k in m.ns} # short dict
        fn = m.canonic(f.f_code.co_filename)
        for i in range(f.f_lineno - 1, f.f_lineno + 2):
            cur = i == f.f_lineno
            C('GB' if cur else 'g'),print(linecache.getline(fn, i), end=''), C(O)
        C('RGB', 'G'), print(' ', sd(m, f.f_globals), sd(m, f.f_locals), ' '), C(O)
        
    # Derived classes should override these methods to gain control over debugger operation.
    def user_call(m, frame, arg_list): 
        'Called from dispatch_call() when there is the possibility that a break might be necessary anywhere inside the called function.'
        m.framecnt += 1

    def user_line(m, frame):
        'Called from dispatch_line() when either stop_here() or break_here() yields True.'
        m.pr_lines(frame)
        
    def user_return(m, frame, ret_val):
        'Called from dispatch_return() when stop_here() yields True.'
        if ret_val == None: return 
        m.framecnt -= 1; C('R'); print(m.framecnt * '  ', 'Ret ', ret_val, sep=''); C(O)

    def user_exception(frame, exc_info):
        'Called from dispatch_exception() when stop_here() yields True.'

    def do_clear(m, arg):
        'Handle how a breakpoint must be removed when it is a temporary one.'
        'This method MUST be implemented by derived classes.'

# termcolor outputs stuff like '\033[0m'. It doesn't work in Windows 10's cmd.

class Color:
    kernel32 = hStdOut = None
    
    def init():
        import ctypes
        Color.user32 = ctypes.CDLL('user32.dll'); Color.kernel32 = ctypes.CDLL('kernel32.dll')
        # https://docs.microsoft.com/en-us/windows/console/setconsoletextattribute
        # HANDLE WINAPI GetStdHandle(DWORD nStdHandle)
        # BOOL WINAPI SetConsoleTextAttribute(HANDLE hConsoleOutput, WORD wAttributes)
        # WINCON.H:
        #define FOREGROUND_BLUE      0x0001 // text color contains blue.
        #define FOREGROUND_GREEN     0x0002 // text color contains green.
        #define FOREGROUND_RED       0x0004 // text color contains red.
        #define FOREGROUND_INTENSITY 0x0008 // text color is intensified.
        #define BACKGROUND_BLUE      0x0010 // background color contains blue.
        #define BACKGROUND_GREEN     0x0020 // background color contains green.
        #define BACKGROUND_RED       0x0040 // background color contains red.
        #define BACKGROUND_INTENSITY 0x0080 // background color is intensified.
        STD_OUTPUT_HANDLE = -11
        Color.hStdOut = Color.kernel32.GetStdHandle(STD_OUTPUT_HANDLE)
    
    def __init__(m, fg_str_or_color, bg = ''):
        if isinstance(fg_str_or_color, int):
            import sys
            sys.stdout.flush()
            Color.kernel32.SetConsoleTextAttribute(Color.hStdOut, fg_str_or_color)
            return
        def f(s):
            t = { 'b':1, 'B':8+1, 'g':2, 'G':8+2, 'r':4, 'R':8+4 }
            d = 0
            for c in s: d |= t.get(c, 0)
            #print(s, hex(d))
            return d
        m.__init__(f(fg_str_or_color) | (f(bg) << 4))

    # 注意缩进和空行！缩进不对__str__成了__init__的内部函数，折腾了半天。    
    def __str__(m): return 'Color'
    
Color.init()

if __name__ == '__main__':
    Color('G'); print('Green ', end=''); Color('rgb'); print('gray')
    print(Color('RGB', 'G'), 'Hello', Color('rgb'), 'world')
    # Color Hello Color world
    # python先把参数求值完再去调print。
    # CMD的color命令也可以设颜色。color/?

# 如果有人想做个cmdcolor包，请把代码拿去自便。甚至可以扩展为WFP - Windows Fun Pack :-)
# 比如一个线程空白DialogBox，另一个干事情。GetWindowDC()后就可以画画了。哪怕GetDC(NULL)
# 在屏幕上画呢。pip install pywin32; D:\Python39\Lib\site-packages\PyWin32.chm
# 简历里一句"开发过一个python wheel，在github上有n颗星"？I admit我爱幻想。
# win32console里一堆函数，如SetConsoleTitle，就是没有SetConsoleTextAttribute。
# 四子棋: https://www.cnblogs.com/funwithwords/p/15626636.html
# 画线和实心椭圆…… GDI
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 和5张牌。

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