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ZejsejjrdZndZe e dS )z?Utilities needed to emulate Python's interactive interpreter.
N)CommandCompilercompile_commandInteractiveInterpreterInteractiveConsoleinteractr c @ sF e Zd ZdZdddZdddZd d
Zdd d Zd
d Zdd Z dS )r zBase class for InteractiveConsole.
This class deals with parsing and interpreter state (the user's
namespace); it doesn't deal with input buffering or prompting or
input file naming (the filename is always passed in explicitly).
Nc C s$ |dkrddd}|| _ t | _dS )a Constructor.
The optional 'locals' argument specifies the dictionary in
which code will be executed; it defaults to a newly created
dictionary with key "__name__" set to "__console__" and key
"__doc__" set to None.
NZ __console__)__name____doc__)localsr compile)selfr r /usr/lib/python3.8/code.py__init__ s
z InteractiveInterpreter.__init__singlec
C sT z| |||}W n& tttfk
r8 | | Y dS X |dkrFdS | | dS )a Compile and run some source in the interpreter.
Arguments are as for compile_command().
One of several things can happen:
1) The input is incorrect; compile_command() raised an
exception (SyntaxError or OverflowError). A syntax traceback
will be printed by calling the showsyntaxerror() method.
2) The input is incomplete, and more input is required;
compile_command() returned None. Nothing happens.
3) The input is complete; compile_command() returned a code
object. The code is executed by calling self.runcode() (which
also handles run-time exceptions, except for SystemExit).
The return value is True in case 2, False in the other cases (unless
an exception is raised). The return value can be used to
decide whether to use sys.ps1 or sys.ps2 to prompt the next
line.
FNT)r
OverflowError SyntaxError
ValueErrorshowsyntaxerrorruncode)r sourcefilenameZsymbolcoder r r
runsource& s
z InteractiveInterpreter.runsourcec C s> zt || j W n( tk
r& Y n | Y nX dS )a Execute a code object.
When an exception occurs, self.showtraceback() is called to
display a traceback. All exceptions are caught except
SystemExit, which is reraised.
A note about KeyboardInterrupt: this exception may occur
elsewhere in this code, and may not always be caught. The
caller should be prepared to deal with it.
N)execr
SystemExit
showtraceback)r r r r r
r M s z InteractiveInterpreter.runcodec C s t \}}}|t _|t _|t _|rp|tkrpz|j\}\}}}} W n tk
rV Y nX t||||| f}|t _t jt j krt
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nt ||| dS )ap Display the syntax error that just occurred.
This doesn't display a stack trace because there isn't one.
If a filename is given, it is stuffed in the exception instead
of what was there before (because Python's parser always uses
"" when reading from a string).
The output is written by self.write(), below.
N)sysexc_info last_type
last_valuelast_tracebackr argsr
excepthook__excepthook__ tracebackformat_exception_onlywritejoin) r r typevaluetbmsgZdummy_filenamelinenooffsetlinelinesr r r
r ` s z&InteractiveInterpreter.showsyntaxerrorc C s| t \t _t _}}|t _zPt|d |d |j}t jt j krT|
d | nt |d |d | W 5 d }}X dS )zDisplay the exception that just occurred.
We remove the first stack item because it is our own code.
The output is written by self.write(), below.
Nr r ) r r r r! r" r& format_exceptiontb_nextr$ r% r( r) )r Zlast_tbZeir1 r r r
r s z$InteractiveInterpreter.showtracebackc C s t j| dS )zWrite a string.
The base implementation writes to sys.stderr; a subclass may
replace this with a different implementation.
N)r stderrr( )r datar r r
r( s z InteractiveInterpreter.write)N)r r )N)
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__module__ __qualname__r r r r r r r( r r r r
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'
#c @ s> e Zd ZdZdddZdd Zddd Zd
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dZdS )r zClosely emulate the behavior of the interactive Python interpreter.
This class builds on InteractiveInterpreter and adds prompting
using the familiar sys.ps1 and sys.ps2, and input buffering.
N c C s t | | || _| dS )zConstructor.
The optional locals argument will be passed to the
InteractiveInterpreter base class.
The optional filename argument should specify the (file)name
of the input stream; it will show up in tracebacks.
N)r r r resetbuffer)r r r r r r
r s
zInteractiveConsole.__init__c C s
g | _ dS )zReset the input buffer.N)buffer)r r r r
r: s z InteractiveConsole.resetbufferc C sR z
t j W n tk
r$ dt _Y nX z
t j W n tk
rJ dt _Y nX d}|dkrx| dt jt j|| jjf n|r| dt | d}zV|rt j}nt j}z|
|}W n& t k
r | d Y W qY n X | |}W q t
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r | d | d}Y qX q|dkr6| d
| jj n|d krN| d| dS ) a Closely emulate the interactive Python console.
The optional banner argument specifies the banner to print
before the first interaction; by default it prints a banner
similar to the one printed by the real Python interpreter,
followed by the current class name in parentheses (so as not
to confuse this with the real interpreter -- since it's so
close!).
The optional exitmsg argument specifies the exit message
printed when exiting. Pass the empty string to suppress
printing an exit message. If exitmsg is not given or None,
a default message is printed.
z>>> z... zFType "help", "copyright", "credits" or "license" for more information.NzPython %s on %s
%s
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KeyboardInterrupt
znow exiting %s...
r )r Zps1AttributeErrorZps2r( versionplatform __class__r str raw_inputEOFErrorpushKeyboardInterruptr: )r bannerexitmsgZcprtmorepromptr0 r r r
r sH
zInteractiveConsole.interactc C s6 | j | d| j }| || j}|s2| |S )a Push a line to the interpreter.
The line should not have a trailing newline; it may have
internal newlines. The line is appended to a buffer and the
interpreter's runsource() method is called with the
concatenated contents of the buffer as source. If this
indicates that the command was executed or invalid, the buffer
is reset; otherwise, the command is incomplete, and the buffer
is left as it was after the line was appended. The return
value is 1 if more input is required, 0 if the line was dealt
with in some way (this is the same as runsource()).
r< )r; appendr) r r r: )r r0 r rH r r r
rD s zInteractiveConsole.pushr c C s t |S )aD Write a prompt and read a line.
The returned line does not include the trailing newline.
When the user enters the EOF key sequence, EOFError is raised.
The base implementation uses the built-in function
input(); a subclass may replace this with a different
implementation.
)input)r rI r r r
rB s z InteractiveConsole.raw_input)Nr9 )NN)r ) r r7 r8 r r r: r rD rB r r r r
r s
6c C sJ t |}|dk r||_n"z ddl}W n tk
r8 Y nX || | dS )a& Closely emulate the interactive Python interpreter.
This is a backwards compatible interface to the InteractiveConsole
class. When readfunc is not specified, it attempts to import the
readline module to enable GNU readline if it is available.
Arguments (all optional, all default to None):
banner -- passed to InteractiveConsole.interact()
readfunc -- if not None, replaces InteractiveConsole.raw_input()
local -- passed to InteractiveInterpreter.__init__()
exitmsg -- passed to InteractiveConsole.interact()
Nr )r rB readline ImportErrorr )rF ZreadfuncZlocalrG ZconsolerL r r r
r s __main__z-q
store_truez*don't print version and copyright messages)actionhelpr )NNNN)r r r& Zcodeopr r __all__r r r r argparseArgumentParserparser add_argument
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