Free a pointer allocated by png_malloc(). If ptr is NULL, return * without taking any action. */

Append rows of `other` to the end of caller, returning a new object. Columns in `other` that are not in the caller are added as new

Form the intersection of two Index objects. This returns a new Index with elements common to the index and `other`. Paramet

Place a legend on the axes. Call signatures:: legend() legend(labels) legend(handles, labels)

Write the contained data to an HDF5 file using HDFStore. Hierarchical Data Format (HDF) is self-describing, allowing an appl

Convert Series from DatetimeIndex to PeriodIndex with desired frequency (inferred from index if not passed). Parameters

Convert argument to timedelta. Timedeltas are absolute differences in times, expressed in difference units (e.g. days, hours, minutes, s

Close the file.

Return a flattened copy of the matrix. All `N` elements of the matrix are placed into a single row. Parameters ----

Return a fixed frequency IntervalIndex Parameters ---------- start : numeric or datetime-like, default None Left bound for g

Add single element to end of ParseResults list of elements. Example:: print(OneOrMore(Word(nums)).parseString("0 123

Read one character from the stream or queue if available. Return EOF when EOF is reached.

Flush all buffers and free all resources.

Check if an object is a pandas extension array type. See the :ref:`Use Guide <extending.extension-types>` for more. Parameters ----

Return slice of panel along selected axis. Parameters ---------- key : object Label axis : {'ite

Return a new Index with elements from the index that are not in `other`. This is the set difference of two Index objects.

Saves a :class:`~matplotlib.figure.Figure` to this file as a new page. Any other keyword arguments are passed to :meth:`~mat

Ensure that we have an index from some index-like object. Parameters ---------- index : sequence An Index or other sequence

Add a :class:`~matplotlib.patches.Patch` *p* to the list of axes patches; the clipbox will be set to the Axes clipping box.

Evaluate a Python expression as a string using various backends. The following arithmetic operations are supported: ``+``, ``-``, ``*``, ``/`

Convenience method for subsetting initial periods of time series data based on a date offset. Parameters ----------

Check whether an array-like or dtype is of the timedelta64 dtype. Parameters ---------- arr_or_dtype : array-like The array-

Return value at the given quantile. Parameters ---------- q : float or array-like, default 0.5 (50% quantile)

Convert a JSON string to pandas object. Parameters ---------- path_or_buf : a valid JSON string or file-like, default: None

Return the mask of a masked array, or nomask. Return the mask of `a` as an ndarray if `a` is a `MaskedArray` and the mask is not `nomask

Check if two dtypes are equal. Parameters ---------- source : The first dtype to compare target : The second dtype to compare

Transform the font by slanting or extending. *effects* should be a dict where ``effects['slant']`` is the tangent of the angl

Raises an AssertionError if two objects are not equal up to desired precision. .. note:: It is recommended to use one of `assert_allclos

Set a title for the axes. Set one of the three available axes titles. The available titles are positioned above the axes in

Override ndarray.argsort. Argsorts the value, omitting NA/null values, and places the result in the same locations as the non-NA valu

Create an element but don't insert it anywhere

Merge holiday calendars together. The caller's class rules take precedence. The merge will be done based on each holiday's

Plot a spectrogram. Call signature:: specgram(x, NFFT=256, Fs=2, Fc=0, detrend=mlab.detrend_none, wind

Test whether the mouse event occurred in the axes. Returns *True* / *False*, {}

Pack object `o` and return packed bytes See :class:`Packer` for options.

Define one or more actions to perform when successfully matching parse element definition. Parse action fn is a callable method wit

Return a fixed frequency DatetimeIndex, with business day as the default frequency Parameters ---------- start : string or datet

Get the path to a data file. Parameters ---------- path : str Path to the file, relative to ``pandas/tests/`` Returns --

Return the distro ID of the current distribution, as a machine-readable string. For a number of OS distributions, the returned distro ID

Trim values at input threshold(s). Assigns values outside boundary to boundary values. Thresholds can be singular values or

Retrieve a :py:class:`datetime.tzinfo` object by its ``tzid``. :param tzid: If there is exactly one time zone available,

Draw everything (plot lines, axes, labels)

Return the y-axis view limits. Returns ------- bottom, top : (float, float) The current y-axis limits in

Set the artist's visibility. Parameters ---------- b : bool

Return a normalized rgba array corresponding to *x*. In the normal case, *x* is a 1-D or 2-D sequence of scalars, and the co

Add single element to end of ParseResults list of elements. Example:: print(OneOrMore(Word(nums)).parseString("0 123 32

Add single element to end of ParseResults list of elements. Example:: print(OneOrMore(Word(nums)).parseString("0 123

Apply a function along an axis of the DataFrame. Objects passed to the function are Series objects whose index is either the

Create a colorbar for a ScalarMappable instance, *mappable*. Documentation for the pyplot thin wrapper: %(colorbar_doc)s

Construct BlockManager from string description. String description syntax looks similar to np.matrix initializer. It looks like this::

Convert structured or record ndarray to DataFrame. Parameters ---------- data : ndarray (structured dtype), list of

Check whether an array-like or dtype is of the datetime64 dtype. Parameters ---------- arr_or_dtype : array-like The array-l

Check whether the provided array or dtype is of a float dtype. This function is internal and should not be exposed in the public API. P

First discrete difference of element. Calculates the difference of a Series element compared with another element in the Ser

Return a copy with masked fields filled with a given value. Parameters ---------- fill_value : scalar, optional

Define name for this expression, makes debugging and exception messages clearer. Example:: Word(nums).parseS

Make a box and whisker plot. Make a box and whisker plot for each column of ``x`` or each vector in sequence ``x``. The box

Return a datetime with the same attributes, except for those attributes given new values by whichever keyword arguments are