Use position="MC" to put text in the subplot tutorial and silence pylint

Author: weiji14

.pylintrc

@@ -441,6 +441,7 @@ function-naming-style=snake_case
 good-names=i,
            j,
            k,
+           ax,
            ex,
            Run,
            _,

examples/tutorials/subplots.py

@@ -46,7 +46,7 @@
     j = index % axs.shape[1]  # column
     fig.sca(ax=axs[i, j])  # sets the current Axes
     fig.text(
-        x=0.5, y=0.5, text=f"index: {index}, row: {i}, col: {j}", region=[0, 1, 0, 1]
+        position="MC", text=f"index: {index}, row: {i}, col: {j}", region=[0, 1, 0, 1]
     )
 fig.end_subplot()
 fig.show()

pygmt/figure.py

@@ -396,10 +396,11 @@ def __init__(self, nrows, ncols, figsize, **kwargs):
         self._activate_figure()
         self.begin_subplot(row=nrows, col=ncols, figsize=figsize, **kwargs)
 
+    @staticmethod
     @fmt_docstring
     @use_alias(Ff="figsize", B="frame")
     @kwargs_to_strings(Ff="sequence")
-    def begin_subplot(self, row=None, col=None, **kwargs):
+    def begin_subplot(row=None, col=None, **kwargs):
         """
         The begin directive of subplot defines the layout of the entire
         multi-panel illustration. Several options are available to specify
@@ -412,9 +413,10 @@ def begin_subplot(self, row=None, col=None, **kwargs):
         with Session() as lib:
             lib.call_module(module="subplot", args=arg_str)
 
+    @staticmethod
     @fmt_docstring
     @use_alias(F="dimensions")
-    def sca(self, ax=None, **kwargs):
+    def sca(ax=None, **kwargs):
         """
         Set the current Axes instance to *ax*.
 
@@ -432,9 +434,10 @@ def sca(self, ax=None, **kwargs):
         with Session() as lib:
             lib.call_module(module="subplot", args=arg_str)
 
+    @staticmethod
     @fmt_docstring
     @use_alias(V="verbose")
-    def end_subplot(self, **kwargs):
+    def end_subplot(**kwargs):
         """
         This command finalizes the current subplot, including any placement
         of tags, and updates the gmt.history to reflect the dimensions and

pygmt/pygmtplot.py

@@ -1,3 +1,6 @@
+"""
+High level functions for making subplots.
+"""
 import numpy as np
 
 from .figure import SubPlot