remove draw(..., line_length, ...) (deprecated after Qiskit#3108) (Qi…

…skit#4507)

* remove line_length

* release note

Co-authored-by: Julien Gacon <[email protected]>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

qiskit/circuit/quantumcircuit.py

@@ -799,7 +799,7 @@ def qasm(self, formatted=False, filename=None):
             return string_temp
 
     def draw(self, output=None, scale=0.7, filename=None, style=None,
-             interactive=False, line_length=None, plot_barriers=True,
+             interactive=False, plot_barriers=True,
              reverse_bits=False, justify=None, vertical_compression='medium', idle_wires=True,
              with_layout=True, fold=None, ax=None, initial_state=False, cregbundle=False):
         """Draw the quantum circuit.
@@ -833,13 +833,6 @@ def draw(self, output=None, scale=0.7, filename=None, style=None,
                 supporting this). Note when used with either the `text` or the
                 `latex_source` output type this has no effect and will be
                 silently ignored.
-            line_length (int): Deprecated; see `fold` which supersedes this
-                option. Sets the length of the lines generated by `text` output
-                type. This is useful when the drawing does not fit in the console.
-                If None (default), it will try to guess the console width using
-                ``shutil.get_terminal_size()``. However, if you're running in
-                jupyter, the default line length is set to 80 characters. If you
-                don't want pagination at all, set ``line_length=-1``.
             reverse_bits (bool): When set to True, reverse the bit order inside
                 registers for the output visualization.
             plot_barriers (bool): Enable/disable drawing barriers in the output
@@ -1009,7 +1002,6 @@ def draw(self, output=None, scale=0.7, filename=None, style=None,
                               filename=filename, style=style,
                               output=output,
                               interactive=interactive,
-                              line_length=line_length,
                               plot_barriers=plot_barriers,
                               reverse_bits=reverse_bits,
                               justify=justify,

qiskit/visualization/circuit_visualization.py

@@ -56,7 +56,6 @@ def circuit_drawer(circuit,
                    style=None,
                    output=None,
                    interactive=False,
-                   line_length=None,
                    plot_barriers=True,
                    reverse_bits=False,
                    justify=None,
@@ -99,13 +98,6 @@ def circuit_drawer(circuit,
             supporting this). Note when used with either the `text` or the
             `latex_source` output type this has no effect and will be silently
             ignored.
-        line_length (int): Deprecated, see `fold` which supersedes this option.
-            Sets the length of the lines generated by `text` output type.
-            This useful when the drawing does not fit in the console. If None
-            (default), it will try to guess the console width using
-            ``shutil.get_terminal_size()``. However, if you're running in
-            jupyter the default line length is set to 80 characters. If you
-            don't want pagination at all, set ``line_length=-1``.
         reverse_bits (bool): When set to True reverse the bit order inside
             registers for the output visualization.
         plot_barriers (bool): Enable/disable drawing barriers in the output
@@ -282,7 +274,6 @@ def circuit_drawer(circuit,
 
     if output == 'text':
         return _text_circuit_drawer(circuit, filename=filename,
-                                    line_length=line_length,
                                     reverse_bits=reverse_bits,
                                     plot_barriers=plot_barriers,
                                     justify=justify,
@@ -411,7 +402,7 @@ def qx_color_scheme():
 # -----------------------------------------------------------------------------
 
 
-def _text_circuit_drawer(circuit, filename=None, line_length=None, reverse_bits=False,
+def _text_circuit_drawer(circuit, filename=None, reverse_bits=False,
                          plot_barriers=True, justify=None, vertical_compression='high',
                          idle_wires=True, with_layout=True, fold=None, initial_state=True,
                          cregbundle=False):
@@ -420,7 +411,6 @@ def _text_circuit_drawer(circuit, filename=None, line_length=None, reverse_bits=
     Args:
         circuit (QuantumCircuit): Input circuit
         filename (str): optional filename to write the result
-        line_length (int): Deprecated. See `fold`.
         reverse_bits (bool): Rearrange the bits in reverse order.
         plot_barriers (bool): Draws the barriers when they are there.
         justify (str) : `left`, `right` or `none`. Defaults to `left`. Says how
@@ -449,9 +439,6 @@ def _text_circuit_drawer(circuit, filename=None, line_length=None, reverse_bits=
         layout = circuit._layout
     else:
         layout = None
-    if line_length:
-        warn('The parameter "line_length" is being replaced by "fold"', DeprecationWarning, 3)
-        fold = line_length
     text_drawing = _text.TextDrawing(qregs, cregs, ops, layout=layout, initial_state=initial_state,
                                      cregbundle=cregbundle)
     text_drawing.plotbarriers = plot_barriers

releasenotes/notes/line_length_remove_0.10-d13e5a15524e67c0.yaml

@@ -0,0 +1,5 @@
+---
+upgrade:
+  - |
+    In 0.10 the parameter ``line_length`` in the method ``QuantumCircuit.draw`` was deprecated.
+    This parameter is being removed.