Try injecting one parameter into method signature

pygmt/helpers/__init__.py

@@ -5,6 +5,7 @@
  deprecate_parameter,
  fmt_docstring,
  kwargs_to_strings,
+ tab_complete_alias,
  use_alias,
 )
 from pygmt.helpers.tempfile import GMTTempFile, tempfile_from_geojson, unique_name

pygmt/helpers/decorators.py

@@ -10,6 +10,7 @@
 import warnings
 
 import numpy as np
+from inspect import signature, Parameter
 from pygmt.exceptions import GMTInvalidInput
 from pygmt.helpers.utils import is_nonstr_iter
 
@@ -327,6 +328,29 @@ def new_module(*args, **kwargs):
  return alias_decorator
 
 
+
+def tab_complete_alias(module_func):
+ """
+ Decorator injecting aliases of a method as attributes
+ """
+ @functools.wraps(module_func)
+ def wrapper(*args, **kwargs):
+ """
+ New module instance that includes aliases in the signature.
+ """
+ sig = signature(module_func)
+ param = Parameter("verbose",kind=Parameter.POSITIONAL_OR_KEYWORD,default=None)
+ wrapped_params = [param for param in sig.parameters.values()]
+ kwargs_param = wrapped_params.pop(-1)
+ all_params = wrapped_params + [param] + [kwargs_param]
+ sig = sig.replace(parameters=all_params)
+ wrapper.__signature__ = sig
+
+ return module_func(*args,**kwargs)
+
+ return wrapper
+
+
 def kwargs_to_strings(**conversions):
  """
  Decorator to convert given keyword arguments to strings.

pygmt/src/blockm.py

@@ -11,8 +11,10 @@
  dummy_context,
  fmt_docstring,
  kwargs_to_strings,
+ tab_complete_alias,
  use_alias,
 )
+from pygmt.helpers.decorators import tab_complete_alias
 
 
 def _blockm(block_method, table, outfile, **kwargs):
@@ -71,6 +73,7 @@ def _blockm(block_method, table, outfile, **kwargs):
 
 
 @fmt_docstring
+@tab_complete_alias
 @use_alias(
  I="spacing",
  R="region",
@@ -132,6 +135,7 @@ def blockmean(table, outfile=None, **kwargs):
 
 
 @fmt_docstring
+@tab_complete_alias
 @use_alias(
  I="spacing",
  R="region",