Expand constructor assignments

This is longer, but cleaner.
Imagine you have to edit it and assignment order gets wrong :P

BTW, normalize PdfFormEnv constructor param order.

src/pypdfium2/_helpers/attachment.py

@@ -36,7 +36,8 @@ class PdfAttachment (pdfium_i.AutoCastable):
 
 
     def __init__(self, raw, pdf):
-        self.raw, self.pdf = raw, pdf
+        self.raw = raw
+        self.pdf = pdf
 
 
     def get_name(self):

src/pypdfium2/_helpers/document.py

@@ -172,7 +172,7 @@ def init_forms(self, config=None):
         raw = pdfium_c.FPDFDOC_InitFormFillEnvironment(self, config)
         if not raw:
             raise PdfiumError(f"Initializing form env failed for document {self}.")
-        self.formenv = PdfFormEnv(raw, config, self)
+        self.formenv = PdfFormEnv(raw, self, config)
         self._add_kid(self.formenv)
 
         if formtype in (pdfium_c.FORMTYPE_XFA_FULL, pdfium_c.FORMTYPE_XFA_FOREGROUND):
@@ -543,8 +543,10 @@ class PdfFormEnv (pdfium_i.AutoCloseable):
             Parent document this form env belongs to.
     """
 
-    def __init__(self, raw, config, pdf):
-        self.raw, self.config, self.pdf = raw, config, pdf
+    def __init__(self, raw, pdf, config):
+        self.raw = raw
+        self.pdf = pdf
+        self.config = config
         super().__init__(PdfFormEnv._close_impl, self.config, self.pdf)
 
     @property
@@ -568,7 +570,8 @@ class PdfXObject (pdfium_i.AutoCloseable):
     """
 
     def __init__(self, raw, pdf):
-        self.raw, self.pdf = raw, pdf
+        self.raw = raw
+        self.pdf = pdf
         super().__init__(pdfium_c.FPDF_CloseXObject)
 
     @property
@@ -629,7 +632,9 @@ class PdfBookmark (pdfium_i.AutoCastable):
     """
 
     def __init__(self, raw, pdf, level):
-        self.raw, self.pdf, self.level = raw, pdf, level
+        self.raw = raw
+        self.pdf = pdf
+        self.level = level
 
     def get_title(self):
         """
@@ -670,7 +675,8 @@ class PdfDest (pdfium_i.AutoCastable):
     """
 
     def __init__(self, raw, pdf):
-        self.raw, self.pdf = raw, pdf
+        self.raw = raw
+        self.pdf = pdf
 
     def get_index(self):
         """

src/pypdfium2/_helpers/matrix.py

@@ -40,17 +40,14 @@ class PdfMatrix:
     def __init__(self, a=1, b=0, c=0, d=1, e=0, f=0):
         self.a, self.b, self.c, self.d, self.e, self.f = a, b, c, d, e, f
 
-
     def __repr__(self):
         return f"PdfMatrix{self.get()}"
 
-
     def __eq__(self, other):
         if type(self) is not type(other):
             return False
         return (self.get() == other.get())
 
-
     @property
     def _as_parameter_(self):
         return ctypes.byref( self.to_raw() )

src/pypdfium2/_helpers/page.py

@@ -27,7 +27,9 @@ class PdfPage (pdfium_i.AutoCloseable):
     """
 
     def __init__(self, raw, pdf, formenv):
-        self.raw, self.pdf, self.formenv = raw, pdf, formenv
+        self.raw = raw
+        self.pdf = pdf
+        self.formenv = formenv
         super().__init__(PdfPage._close_impl, self.formenv)
 
 

src/pypdfium2/_helpers/pageobjects.py

@@ -55,7 +55,10 @@ def __new__(cls, raw, *args, **kwargs):
 
     def __init__(self, raw, page=None, pdf=None, level=0):
 
-        self.raw, self.page, self.pdf, self.level = raw, page, pdf, level
+        self.raw = raw
+        self.page = page
+        self.pdf = pdf
+        self.level = level
 
         if page is not None:
             if self.pdf is None: