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PythonStandardLibrary
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lib02.24-code.py
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lib02.24-code.py
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'''
code 模块
code 模块提供了一些用于模拟标准交互解释器行为的函数.
compile_command 与内建 compile 函数行为相似, 但它会通过测试来保证你传递的是一个完成的 Python 语句.
'''
a = (1, 2, 3)
print(a)
# 使用 code 模块编译语句
import code
SCRIPT = ['a=(', '1,' '2,' '3', ')', 'print(a)']
script = ''
for line in SCRIPT:
script = script + line + '\n'
co = code.compile_command(script, '<stdin>', 'exec')
if co:
# got a complete statement. execute it!
print('-' * 40)
print(script)
print('-' * 40)
exec(co)
script = ''
# 使用 code 模块模拟交互解释器
# InteractiveConsole 类实现了一个交互控制台, 类似你启动的 Python 解释器交互模式.
# 控制台可以是活动的(自动调用函数到达下一行) 或是被动的(当有新数据时调用 push 方法).
# 默认使用内建的 raw_input 函数. 如果你想使用另个输入函数, 你可以使用相同的名称重载这个方法.
import code
console = code.InteractiveConsole()
#console.interact()
print('---------------------------------------')
# 使用 code 模块实现简单的 Debugging
# keyboard 函数. 它允许你在程序中手动控制交互解释器.
def keyboard(banner = None):
import code, sys
# use exception trick to pick up the current frame
try:
raise(None)
except:
frame = sys.exc_info()[2].tb_frame.f_back
# evaluate commands in current namespace
namespace = frame.f_globals.copy()
namespace.update(frame.f_locals)
code.interact(banner = banner, local = namespace)
def func():
print('START')
a = 10
keyboard()
print('END')
func()
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