Part 3 of Py2.3 update

Misc/cheatsheet

@@ -208,7 +208,7 @@ Highest             Operator                             Comment
                                           calls
         +x, -x, ~x                        Unary operators
         x**y                              Power
-        x*y  x/y  x%y                     mult, division, modulo
+        x*y  x/y  x%y x//y                mult, division, modulo, floor division
         x+y  x-y                          addition, substraction
         x<<y   x>>y                       Bit shifting
         x&y                               Bitwise and
@@ -332,13 +332,15 @@ OverflowError
      numeric bounds exceeded
 ZeroDivisionError
      raised when zero second argument of div or modulo op
+FloatingPointError
+     raised when a floating point operation fails
 
 Operations on all sequence types (lists, tuples, strings)
 
                 Operations on all sequence types
 Operation                     Result                     Notes
-x in s     1 if an item of s is equal to x, else 0
+x in s     True if an item of s is equal to x, else False
-x not in s 0 if an item of s is equal to x, else 1
+x not in s False if an item of s is equal to x, else True
 for x in s: loops over the sequence
 s + t      the concatenation of s and t
 s * n, n*s n copies of s concatenated
@@ -404,7 +406,7 @@ del d[k]                   remove d[k] from d                       (1)
 d.clear()                  remove all items from d
 d.copy()                   a shallow copy of d
 d.get(k,defaultval)        the item of d with key k                 (4)
-d.has_key(k)               1 if d has key k, else 0
+d.has_key(k)               True if d has key k, else False
 d.items()                  a copy of d's list of (key, item) pairs  (2)
 d.iteritems()              an iterator over (key, value) pairs      (7)
 d.iterkeys()               an iterator over the keys of d           (7)
@@ -599,7 +601,7 @@ Operators on file objects
 f.close()         Close file f.
 f.fileno()        Get fileno (fd) for file f.
 f.flush()         Flush file f's internal buffer.
-f.isatty()        1 if file f is connected to a tty-like dev, else 0.
+f.isatty()        True if file f is connected to a tty-like dev, else False.
 f.read([size])    Read at most size bytes from file f and return as a string
                   object. If size omitted, read to EOF.
 f.readline()      Read one entire line from file f.
@@ -619,7 +621,9 @@ File Exceptions
      End-of-file hit when reading (may be raised many times, e.g. if f is a
     tty).
   IOError
-     Other I/O-related I/O operation failure
+     Other I/O-related I/O operation failure.
+  OSError
+     OS system call failed.
 
 
     Advanced Types
@@ -717,6 +721,10 @@ File Exceptions
     continue        -- immediately does next iteration of "for" or "while" loop
     return [result] -- Exits from function (or method) and returns result (use a tuple to
                        return more than one value). If no result given, then returns None.
+    yield result    -- Freezes the execution frame of a generator and returns the result
+                       to the iterator's .next() method.  Upon the next call to next(),
+                       resumes execution at the frozen point with all of the local variables
+                       still intact.
 
     Exception Statements
 
@@ -919,8 +927,12 @@ fromlist]]])
 abs(x)              Return the absolute value of number x.
 apply(f, args[,     Calls func/method f with arguments args and optional
 keywords])          keywords.
-callable(x)         Returns 1 if x callable, else 0.
+bool(x)             Returns True when the argument x is true and False otherwise.
+buffer(obj)         Creates a buffer reference to an object.
+callable(x)         Returns True if x callable, else False.
 chr(i)              Returns one-character string whose ASCII code isinteger i
+classmethod(f)      Converts a function f, into a method with the class as the
+                    first argument.  Useful for creating alternative constructors.
 cmp(x,y)            Returns negative, 0, positive if x <, ==, > to y
 coerce(x,y)         Returns a tuple of the two numeric arguments converted to a
                     common type.
@@ -934,15 +946,18 @@ complex(real[,      Builds a complex object (can also be done using J or j
 image])             suffix,e.g. 1+3J)
 delattr(obj, name)  deletes attribute named name of object obj <=> del obj.name
                     If no args, returns the list of names in current
+dict([items])       Create a new dictionary from the specified item list.
 dir([object])       localsymbol table. With a module, class or class
                     instanceobject as arg, returns list of names in its attr.
                     dict.
 divmod(a,b)         Returns tuple of (a/b, a%b)
+enumerate(seq)      Return a iterator giving:  (0, seq[0]), (1, seq[1]), ...
 eval(s[, globals[,  Eval string s in (optional) globals, locals contexts.s must
 locals]])           have no NUL's or newlines. s can also be acode object.
                     Example: x = 1; incr_x = eval('x + 1')
 execfile(file[,     Executes a file without creating a new module, unlike
 globals[, locals]]) import.
+file()              Synonym for open().
 filter(function,    Constructs a list from those elements of sequence for which
 sequence)           function returns true. function takes one parameter.
 float(x)            Converts a number or a string to floating point.
@@ -953,6 +968,7 @@ globals()           Returns a dictionary containing current global variables.
 hasattr(object,     Returns true if object has attr called name.
 name)
 hash(object)        Returns the hash value of the object (if it has one)
+help(f)             Display documentation on object f.
 hex(x)              Converts a number x to a hexadecimal string.
 id(object)          Returns a unique 'identity' integer for an object.
 input([prompt])     Prints prompt if given. Reads input and evaluates it.
@@ -966,6 +982,7 @@ class)              (A,B) then isinstance(x,A) => isinstance(x,B)
 issubclass(class1,  returns true if class1 is derived from class2
 class2)
                     Returns the length (the number of items) of an object
+iter(collection)    Returns an iterator over the collection.
 len(obj)            (sequence, dictionary, or instance of class implementing
                     __len__).
 list(sequence)      Converts sequence into a list. If already a list,returns a
@@ -987,7 +1004,12 @@ implementation      1 for line-buffered, negative forsys-default, all else, of
 dependent]])        (about) given size.
 ord(c)              Returns integer ASCII value of c (a string of len 1). Works
                     with Unicode char.
+object()            Create a base type.  Used as a superclass for new-style objects.
+open(name           Open a file.
+  [, mode
+  [, buffering]])
 pow(x, y [, z])     Returns x to power y [modulo z]. See also ** operator.
+property()          Created a property with access controlled by functions.
 range(start [,end   Returns list of ints from >= start and < end.With 1 arg,
 [, step]])          list from 0..arg-1With 2 args, list from start..end-1With 3
                     args, list from start up to end by step
@@ -1012,8 +1034,13 @@ name, value)        3) <=> o.foobar = 3Creates attribute if it doesn't exist!
 slice([start,] stop Returns a slice object representing a range, with R/
 [, step])           Oattributes: start, stop, step.
                     Returns a string containing a nicely
+staticmethod()      Convert a function to method with no self or class
+                    argument.  Useful for methods associated with a class that
+                    do not need access to an object's internal state.
 str(object)         printablerepresentation of an object. Class overridable
                     (__str__).See also repr().
+super(type)         Create an unbound super object.  Used to call cooperative
+                    superclass methods.
 tuple(sequence)     Creates a tuple with same elements as sequence. If already
                     a tuple, return itself (not a copy).
                     Returns a type object [see module types] representing
@@ -1045,6 +1072,8 @@ Exception>
          Root class for all exceptions
     SystemExit
          On 'sys.exit()'
+    StopIteration
+         Signal the end from iterator.next()
     StandardError
                  Base class for all built-in exceptions; derived from Exception
     root class.
@@ -1099,6 +1128,14 @@ Exception>
          On passing inappropriate type to built-in op or func
         ValueError
          On arg error not covered by TypeError or more precise
+    Warning
+              UserWarning
+              DeprecationWarning
+              PendingDeprecationWarning
+              SyntaxWarning
+              OverflowWarning
+              RuntimeWarning
+              FutureWarning
 
 
 
@@ -1122,7 +1159,7 @@ Special methods for any class
         __cmp__(s, o)     Compares s to o and returns <0, 0, or >0.
                           Implements >, <, == etc...
         __hash__(s)       Compute a 32 bit hash code; hash() and dictionary ops
-        __nonzero__(s)    Returns 0 or 1 for truth value testing
+        __nonzero__(s)    Returns False or True for truth value testing
         __getattr__(s, name)  called when attr lookup doesn't find <name>
         __setattr__(s, name, val) called when setting an attr
                                   (inside, don't use "self.name = value"
@@ -1188,19 +1225,16 @@ Operators
 
 Special informative state attributes for some types:
 
-    Lists & Dictionaries:
-        __methods__ (list, R/O): list of method names of the object
-
     Modules:
         __doc__ (string/None, R/O): doc string (<=> __dict__['__doc__'])
         __name__(string, R/O): module name (also in __dict__['__name__'])
         __dict__ (dict, R/O): module's name space
         __file__(string/undefined, R/O): pathname of .pyc, .pyo or .pyd (undef for
                  modules statically linked to the interpreter)
-        __path__(string/undefined, R/O): fully qualified package name when applies.
 
     Classes:    [in bold: writable since 1.5.2]
         __doc__ (string/None, R/W): doc string (<=> __dict__['__doc__'])
+        __module__ is the module name in which the class was defined
         __name__(string, R/W): class name (also in __dict__['__name__'])
         __bases__ (tuple, R/W): parent classes
         __dict__ (dict, R/W): attributes (class name space)
@@ -1208,6 +1242,7 @@ Special informative state attributes for some types:
     Instances:
         __class__ (class, R/W): instance's class
         __dict__ (dict, R/W): attributes
+
     User-defined functions: [bold: writable since 1.5.2]
         __doc__ (string/None, R/W): doc string
         __name__(string, R/O): function name
@@ -1216,6 +1251,11 @@ Special informative state attributes for some types:
         func_defaults (tuple/None, R/W): default args values if any
         func_code (code, R/W): code object representing the compiled function body
         func_globals (dict, R/O): ref to dictionary of func global variables
+        func_dict (dict, R/W):  same as __dict__ contains the namespace supporting
+            arbitrary function attributes
+        func_closure (R/O): None or a tuple of cells that contain bindings
+            for the function's free variables.
+
 
     User-defined Methods:
         __doc__ (string/None, R/O): doc string
@@ -1223,16 +1263,20 @@ Special informative state attributes for some types:
         im_class (class, R/O): class defining the method (may be a base class)
         im_self (instance/None, R/O): target instance object (None if unbound)
         im_func (function, R/O): function object
+
     Built-in Functions & methods:
         __doc__ (string/None, R/O): doc string
         __name__ (string, R/O): function name
         __self__ : [methods only] target object
-        __members__ = list of attr names: ['__doc__','__name__','__self__'])
+
     Codes:
         co_name (string, R/O): function name
         co_argcount (int, R/0): number of positional args
         co_nlocals (int, R/O): number of local vars (including args)
         co_varnames (tuple, R/O): names of local vars (starting with args)
+        co_cellvars (tuple, R/O)) the names of local variables referenced by
+            nested functions
+        co_freevars (tuple, R/O)) names of free variables
         co_code (string, R/O): sequence of bytecode instructions
         co_consts (tuple, R/O): litterals used by the bytecode, 1st one is
                                 fct doc (or None)
@@ -1241,7 +1285,6 @@ Special informative state attributes for some types:
         co_firstlineno (int, R/O): first line number of the function
         co_lnotab (string, R/O): string encoding bytecode offsets to line numbers.
         co_stacksize (int, R/O): required stack size (including local vars)
-        co_firstlineno (int, R/O): first line number of the function
         co_flags (int, R/O): flags for the interpreter
                            bit 2 set if fct uses "*arg" syntax
                            bit 3 set if fct uses '**keywords' syntax
@@ -1274,8 +1317,6 @@ Special informative state attributes for some types:
     Complex numbers:
         real (float, R/O): real part
         imag (float, R/O): imaginary part
-    XRanges:
-        tolist (Built-in method, R/O): ?
 
 
 Important Modules
@@ -1316,7 +1357,7 @@ version_info         tuple containing Python version info - (major, minor,
      Function                                 Result
 exit(n)            Exits with status n. Raises SystemExit exception.(Hence can
                    be caught and ignored by program)
-getrefcount(object Returns the reference count of the object. Generally 1
+getrefcount(object Returns the reference count of the object. Generally one
 )                  higher than you might expect, because of object arg temp
                    reference.
 setcheckinterval(  Sets the interpreter's thread switching interval (in number
@@ -1754,16 +1795,18 @@ atan2(x, y)
 ceil(x)
 cos(x)
 cosh(x)
+degrees(x)
 exp(x)
 fabs(x)
 floor(x)
 fmod(x, y)
 frexp(x)        -- Unlike C: (float, int) = frexp(float)
 ldexp(x, y)
-log(x)
+log(x [,base])
 log10(x)
 modf(x)         -- Unlike C: (float, float) = modf(float)
 pow(x, y)
+radians(x)
 sin(x)
 sinh(x)
 sqrt(x)
@@ -1981,8 +2024,6 @@ zipfile          Read & write PK zipped files.
 
 
 
-(following list not revised)
-
 * Built-ins *
 
             sys                 Interpreter state vars and functions
@@ -1990,7 +2031,7 @@ zipfile          Read & write PK zipped files.
             __main__            Scope of the interpreters main program, script or stdin
             array               Obj efficiently representing arrays of basic values
             math                Math functions of C standard
-            time                Time-related functions
+            time                Time-related functions (also the newer datetime module)
             regex               Regular expression matching operations
             marshal             Read and write some python values in binary format
             struct              Convert between python values and C structs
@@ -2001,7 +2042,7 @@ zipfile          Read & write PK zipped files.
             os                  A more portable interface to OS dependent functionality
             re                  Functions useful for working with regular expressions
             string              Useful string and characters functions and exceptions
-            whrandom            Wichmann-Hill pseudo-random number generator
+            random              Mersenne Twister pseudo-random number generator
             thread              Low-level primitives for working with process threads
             threading           idem, new recommanded interface.
 
@@ -2031,6 +2072,7 @@ zipfile          Read & write PK zipped files.
             md5         Interface to RSA's MD5 message digest algorithm
             mpz         Interface to int part of GNU multiple precision library
             rotor       Implementation of a rotor-based encryption algorithm
+            HMAC        Keyed-Hashing for Message Authentication -- RFC 2104.
 
 * Stdwin * Standard Window System
 
@@ -2060,8 +2102,6 @@ Workspace exploration and idiom hints
 
         dir(<module>)   list functions, variables in <module>
         dir()           get object keys, defaults to local name space
-        X.__methods__   list of methods supported by X (if any)
-        X.__members__   List of X's data attributes
         if __name__ == '__main__': main()            invoke main if running as script
         map(None, lst1, lst2, ...)                   merge lists
         b = a[:]                                     create copy of seq structure
@@ -2107,6 +2147,8 @@ C-c C-c sends the entire buffer to the Python interpreter
 C-c |   sends the current region
 C-c !   starts a Python interpreter window; this will be used by
         subsequent C-c C-c or C-c | commands
+C-c C-w runs PyChecker
+
 VARIABLES
 py-indent-offset        indentation increment
 py-block-comment-prefix comment string used by py-comment-region
@@ -2169,6 +2211,8 @@ r, return
         can be printed or manipulated from debugger)
 c, continue
         continue until next breakpoint
+j, jump lineno
+        Set the next line that will be executed
 a, args
         print args to current function
 rv, retval