MAINT: Inline PAGE_RANGE_HELP string (#874)

PyPDF2/pagerange.py

@@ -17,20 +17,6 @@
 # groups:         12     34     5 6     7 8
 
 
-PAGE_RANGE_HELP = """Remember, page indices start with zero.
-        Page range expression examples:
-            :     all pages.                   -1    last page.
-            22    just the 23rd page.          :-1   all but the last page.
-            0:3   the first three pages.       -2    second-to-last page.
-            :3    the first three pages.       -2:   last two pages.
-            5:    from the sixth page onward.  -3:-1 third & second to last.
-        The third, "stride" or "step" number is also recognized.
-            ::2       0 2 4 ... to the end.    3:0:-1    3 2 1 but not 0.
-            1:10:2    1 3 5 7 9                2::-1     2 1 0.
-            ::-1      all pages in reverse order.
-"""
-
-
 class PageRange:
     """
     A slice-like representation of a range of page indices,
@@ -55,7 +41,17 @@ def __init__(self, arg: Union[slice, "PageRange", str]) -> None:
         or a string like
             "int", "[int]:[int]" or "[int]:[int]:[int]",
             where the brackets indicate optional ints.
-        {page_range_help}
+        Remember, page indices start with zero.
+        Page range expression examples:
+            :     all pages.                   -1    last page.
+            22    just the 23rd page.          :-1   all but the last page.
+            0:3   the first three pages.       -2    second-to-last page.
+            :3    the first three pages.       -2:   last two pages.
+            5:    from the sixth page onward.  -3:-1 third & second to last.
+        The third, "stride" or "step" number is also recognized.
+            ::2       0 2 4 ... to the end.    3:0:-1    3 2 1 but not 0.
+            1:10:2    1 3 5 7 9                2::-1     2 1 0.
+            ::-1      all pages in reverse order.
         Note the difference between this notation and arguments to slice():
             slice(3) means the first three pages;
             PageRange("3") means the range of only the fourth page.
@@ -80,9 +76,6 @@ def __init__(self, arg: Union[slice, "PageRange", str]) -> None:
         else:
             self._slice = slice(*[int(g) if g else None for g in m.group(4, 6, 8)])
 
-    if __init__.__doc__:  # see https://github.com/py-pdf/PyPDF2/issues/737
-        __init__.__doc__ = __init__.__doc__.format(page_range_help=PAGE_RANGE_HELP)
-
     @staticmethod
     def valid(input: Any) -> bool:
         """True if input is a valid initializer for a PageRange."""

tests/test_pagerange.py

@@ -78,11 +78,3 @@ def test_parse_filename_page_ranges_err():
     assert (
         exc.value.args[0] == "The first argument must be a filename, not a page range."
     )
-
-
-def test_page_range_help():
-    from PyPDF2.pagerange import PAGE_RANGE_HELP
-
-    assert len(PAGE_RANGE_HELP) > 20
-    assert "0:3" in PAGE_RANGE_HELP
-    assert PAGE_RANGE_HELP.endswith("\n")