qsize() Return the approximate size of the queue. Because of multithreading/multiprocessing semantics, this number is not reliable. Note that this may raise NotImplementedError on Unix platforms like Mac OS X where sem_getvalue() is not implemented.

add_header(name, value, **_params) Add a (possibly multi-valued) header, with optional MIME parameters specified via keyword arguments. name is the header field to add. Keyword arguments can be used to set MIME parameters for the header field. Each parameter must be a string or None. Underscores in parameter names are converted to dashes, since dashes are illegal in Python identifiers, but many MIME parameter names include dashes. If the parameter value is a string, it is added to the header

rollback() This method rolls back any changes to the database since the last call to commit().

operator.__xor__(a, b) Return the bitwise exclusive or of a and b.

class bool([x]) Return a Boolean value, i.e. one of True or False. x is converted using the standard truth testing procedure. If x is false or omitted, this returns False; otherwise it returns True. The bool class is a subclass of int (see Numeric Types — int, float, complex). It cannot be subclassed further. Its only instances are False and True (see Boolean Values).

class ctypes.Array(*args) Abstract base class for arrays. The recommended way to create concrete array types is by multiplying any ctypes data type with a positive integer. Alternatively, you can subclass this type and define _length_ and _type_ class variables. Array elements can be read and written using standard subscript and slice accesses; for slice reads, the resulting object is not itself an Array. _length_ A positive integer specifying the number of elements in the array. Out-of-r

bytes.find(sub[, start[, end]]) bytearray.find(sub[, start[, end]]) Return the lowest index in the data where the subsequence sub is found, such that sub is contained in the slice s[start:end]. Optional arguments start and end are interpreted as in slice notation. Return -1 if sub is not found. The subsequence to search for may be any bytes-like object or an integer in the range 0 to 255. Note The find() method should be used only if you need to know the position of sub. To check if sub is a

sys.getprofile() Get the profiler function as set by setprofile().

emit(record) Outputs the record to the file.

path_stats(path) Optional abstract method which returns a dict containing metadata about the specified path. Supported dictionary keys are: 'mtime' (mandatory): an integer or floating-point number representing the modification time of the source code; 'size' (optional): the size in bytes of the source code. Any other keys in the dictionary are ignored, to allow for future extensions. If the path cannot be handled, OSError is raised. New in version 3.3. Changed in version 3.4: Raise OS