Re: How to obtain a 'interactive session' of a script?

[Fredrik Lundh]

Bo Peng wrote:

 I have a long list of commands in the form of a script and would like to
  obtain a log file as if I enter the commands one by one. (The output
 will be used in a tutorial.) What would be the best way to do it? Copy
 and paste is not acceptable since I make frequent changes tot he script.

the first example on this page

http://effbot.org/librarybook/code.htm

shows how to execute Python code line by line.

here's a variation that echoes the script fragments with the right prompts
in front of them:

import code

SCRIPT = [line.rstrip() for line in open(myscript.py)]

script = 
prompt = 

for line in SCRIPT:
print prompt, line
script = script + line + \n
co = code.compile_command(script, stdin, exec)
if co:
# got a complete statement.  execute it!
exec co
script = 
prompt = 
else:
prompt = ...

/F 



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Re: How to obtain a 'interactive session' of a script?

[jepler]

The 'code' module contains 'Utilities needed to emulate Python's interactive
interpreter.'.  By subclassing code.InteractiveConsole and replacing the
raw_input method with one which reads from a file, I think you can get what you
want.

The example below the classes uses StringIO so that it can be self-contained,
but you'll probably use a regular file instead.

import code, sys

class BoPeng(code.InteractiveConsole):
def __init__(self, locals=None, filename=console, file = None):
self.file = file or open(filename)
code.InteractiveConsole.__init__(self, locals, filename)

def raw_input(self, prompt):
l = self.file.readline()
if l == '': raise EOFError
sys.stdout.write(prompt + l)
return l.strip(\n)

session = '''\
print 3+3
for i in range(10):
print i

print Example of a traceback:
1/0
'''

import StringIO
b = BoPeng(file = StringIO.StringIO(session))
b.interact(None)


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Re: How to obtain a 'interactive session' of a script?

[Bo Peng]

Thank you for the suggestions and code!

 import code
 
 SCRIPT = [line.rstrip() for line in open(myscript.py)]
 
 script = 
 prompt = 
 
 for line in SCRIPT:
 print prompt, line
 script = script + line + \n
 co = code.compile_command(script, stdin, exec)
 if co:
 # got a complete statement.  execute it!
 exec co
 script = 
 prompt = 
 else:
 prompt = ...
 

This one fails at function definition.

def fun():
   a=1
   b=2   --- not included.

Still trying other methods.
Bo
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Re: How to obtain a 'interactive session' of a script?

[Bo Peng]

[EMAIL PROTECTED] wrote:
 The 'code' module contains 'Utilities needed to emulate Python's interactive
 interpreter.'.  By subclassing code.InteractiveConsole and replacing the
 raw_input method with one which reads from a file, I think you can get what 
 you
 want.

This method works fine with only one minor problem. It would stop 
(waiting for user input) at help(str) command. I will have to find a way 
to feed the program with'q' etc.

Bo
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Re: How to obtain a 'interactive session' of a script?

[Fredrik Lundh]

Bo Peng wrote:

 import code

 SCRIPT = [line.rstrip() for line in open(myscript.py)]

 script = 
 prompt = 

 for line in SCRIPT:
 print prompt, line
 script = script + line + \n
 co = code.compile_command(script, stdin, exec)
 if co:
 # got a complete statement.  execute it!
 exec co
 script = 
 prompt = 
 else:
 prompt = ...

 This one fails at function definition.

 def fun():
   a=1
   b=2   --- not included.

hmm.  looks like a bug in compile_command.  stripping off the trailing
newline seems to fix it:

co = code.compile_command(script[:-1], stdin, exec)

(to make things look right, you need to add an empty line after each
function definition in your code)

/F 



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Re: How to obtain a 'interactive session' of a script?

[Fredrik Lundh]

Bo Peng wrote:

 This method works fine with only one minor problem. It would stop
 (waiting for user input) at help(str) command. I will have to find a way
 to feed the program with'q' etc.

replacing sys.stdin with something that isn't a TTY will fix this.

here's one way to do it:

class wrapper:
def __init__(self, file):
self.file = file
def isatty(self):
return 0
def __getattr__(self, key):
return getattr(self.file, key)

sys.stdin = wrapper(sys.stdin)

/F 



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Re: How to obtain a 'interactive session' of a script?

[Bo Peng]

Fredrik Lundh wrote:
 replacing sys.stdin with something that isn't a TTY will fix this.

This works like magic! Thank you!

Bo
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