fix: save lines, add DR codeblock

Author: martin-martin

how-to-check-if-a-python-string-contains-a-substring/check_case.py

@@ -1,8 +1,7 @@
 file_content_title = """Hi There And Welcome.
 This Is A Special Hidden File With A Secret Secret.
-I Don'T Want To Tell You The Secret,
-But I Do Want To Secretly Tell You That I Have One.
-"""
+I Don't Want To Tell You The Secret,
+But I Do Want To Secretly Tell You That I Have One."""
 
 # Strings are case-sensitive
 print("secret" in file_content_title)  # False

how-to-check-if-a-python-string-contains-a-substring/check_substring.py

@@ -1,8 +1,7 @@
 raw_file_content = """Hi there and welcome.
 This is a special hidden file with a SECRET secret.
 I don't want to tell you The Secret,
-but I do want to secretly tell you that I have one.
-"""
+but I do want to secretly tell you that I have one."""
 
 # Use the membership operator for pythonic membership checks
 print("secret" in raw_file_content)

how-to-check-if-a-python-string-contains-a-substring/regex_search.py

@@ -4,8 +4,7 @@
 file_content = """hi there and welcome.
 this is a special hidden file with a secret secret.
 i don't want to tell you the secret,
-but i do want to secretly tell you that i have one.
-"""
+but i do want to secretly tell you that i have one."""
 
 # Find words that start with "secret"
 print(re.search(r"secret\w+", file_content))
@@ -21,9 +20,13 @@
 # Find all words followed by certain punctuation characters
 print(re.findall(r"secret[\.,]", file_content))
 
-# Use a capture group to remove the punctuation character
+# Use a capturing group to remove the punctuation character
 print(re.findall(r"(secret)[\.,]", file_content))
 
 # Iterate over all matches as Match objects
 for match in re.finditer(r"(secret)[\.,]", file_content):
     print(match)
+
+# Print only the first capturing group from the match
+for match in re.finditer(r"(secret)[\.,]", file_content):
+    print(match.group(1))

how-to-check-if-a-python-string-contains-a-substring/string_info.py

@@ -1,8 +1,7 @@
 file_content = """hi there and welcome.
 this is a special hidden file with a secret secret.
 i don't want to tell you the secret,
-but i do want to secretly tell you that i have one.
-"""
+but i do want to secretly tell you that i have one."""
 
 # Use .index() to get the starting index of the first match
 print(file_content.index("secret"))