Adding css_first and xpath_first for easier usage

README.md

@@ -59,7 +59,7 @@ quotes = page.css('.quote').css('.text::text')  # Chained selectors
 quotes = [element.text for element in page.css('.quote').css('.text')]  # Slower than bulk query above
 
 # Get the first quote element
-quote = page.css('.quote').first  # or [0] or .get()
+quote = page.css_first('.quote')  # or page.css('.quote').first or [0] or .get()
 
 # Working with elements
 quote.html_content  # Inner HTML
@@ -244,8 +244,8 @@ To increase the complexity a little bit, let's say we want to get all books' dat
 ```python
 >>> for product in page.find_by_text('Tipping the Velvet').parent.parent.find_similar():
         print({
-            "name": product.css('h3 a::text')[0],
+            "name": product.css_first('h3 a::text'),
-            "price": product.css('.price_color')[0].re_first(r'[\d\.]+'),
+            "price": product.css_first('.price_color').re_first(r'[\d\.]+'),
             "stock": product.css('.availability::text')[-1].clean()
         })
 {'name': 'A Light in the ...', 'price': '51.77', 'stock': 'In stock'}

scrapling/parser.py

@@ -394,6 +394,58 @@ class Adaptor(SelectorsGeneration):
                 return self.__convert_results(score_table[highest_probability])
         return []
 
+    def css_first(self, selector: str, identifier: str = '',
+                  auto_match: bool = False, auto_save: bool = False, percentage: int = 0
+                  ) -> Union['Adaptors[Adaptor]', List, None]:
+        """Search current tree with CSS3 selectors and return the first result if possible, otherwise return `None`
+
+        **Important:
+        It's recommended to use the identifier argument if you plan to use different selector later
+        and want to relocate the same element(s)**
+
+        :param selector: The CSS3 selector to be used.
+        :param auto_match: Enabled will make function try to relocate the element if it was 'saved' before
+        :param identifier: A string that will be used to save/retrieve element's data in auto-matching
+         otherwise the selector will be used.
+        :param auto_save: Automatically save new elements for `auto_match` later
+        :param percentage: The minimum percentage to accept while auto-matching and not going lower than that.
+         Be aware that the percentage calculation depends solely on the page structure so don't play with this
+         number unless you must know what you are doing!
+
+        :return: List as :class:`Adaptors`
+        """
+        try:
+            return self.css(selector, identifier, auto_match, auto_save, percentage)[0]
+        except (IndexError, TypeError,):
+            return None
+
+    def xpath_first(self, selector: str, identifier: str = '',
+                    auto_match: bool = False, auto_save: bool = False, percentage: int = 0, **kwargs: Any
+                    ) -> Union['Adaptors[Adaptor]', List, None]:
+        """Search current tree with XPath selectors and return the first result if possible, otherwise return `None`
+
+        **Important:
+        It's recommended to use the identifier argument if you plan to use different selector later
+        and want to relocate the same element(s)**
+
+         Note: **Additional keyword arguments will be passed as XPath variables in the XPath expression!**
+
+        :param selector: The XPath selector to be used.
+        :param auto_match: Enabled will make function try to relocate the element if it was 'saved' before
+        :param identifier: A string that will be used to save/retrieve element's data in auto-matching
+         otherwise the selector will be used.
+        :param auto_save: Automatically save new elements for `auto_match` later
+        :param percentage: The minimum percentage to accept while auto-matching and not going lower than that.
+         Be aware that the percentage calculation depends solely on the page structure so don't play with this
+         number unless you must know what you are doing!
+
+        :return: List as :class:`Adaptors`
+        """
+        try:
+            return self.xpath(selector, identifier, auto_match, auto_save, percentage, **kwargs)[0]
+        except (IndexError, TypeError,):
+            return None
+
     def css(self, selector: str, identifier: str = '',
             auto_match: bool = False, auto_save: bool = False, percentage: int = 0
             ) -> Union['Adaptors[Adaptor]', List]: