From d2839650b6572dedc405c0bc8e849cf4a84119ba Mon Sep 17 00:00:00 2001
From: Farhan Ahmad <fa6768243@gmail.com>
Date: Sat, 3 Jan 2026 22:08:26 +0500
Subject: [PATCH 1/6] docs: add check_pangram with doctests

Implement a function to check if a string is a pangram.
---
 strings/check_pangram.py | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 strings/check_pangram.py

diff --git a/strings/check_pangram.py b/strings/check_pangram.py
new file mode 100644
index 000000000000..5ea15aa65104
--- /dev/null
+++ b/strings/check_pangram.py
@@ -0,0 +1,16 @@
+def check_pangram(input_str: str) -> bool:
+    """
+    Check if a string is a pangram (contains every letter of the alphabet).
+    >>> check_pangram("The quick brown fox jumps over the lazy dog")
+    True
+    >>> check_pangram("Hello World")
+    False
+    >>> check_pangram("")
+    False
+    """
+    return len(set(c for c in input_str.lower() if c.isalpha())) == 26
+
+
+if __name__ == "__main__":
+    import doctest
+    doctest.testmod()

From a76637bea13b2207e6a7eacc6fc08f44cd21e8f8 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Sat, 3 Jan 2026 17:10:43 +0000
Subject: [PATCH 2/6] [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci
---
 strings/check_pangram.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/strings/check_pangram.py b/strings/check_pangram.py
index 5ea15aa65104..ca5136c0f92a 100644
--- a/strings/check_pangram.py
+++ b/strings/check_pangram.py
@@ -13,4 +13,5 @@ def check_pangram(input_str: str) -> bool:
 
 if __name__ == "__main__":
     import doctest
+
     doctest.testmod()

From 0674c029a408e542c394b08e627d69693002bbb7 Mon Sep 17 00:00:00 2001
From: Farhan Ahmad <fa6768243@gmail.com>
Date: Sat, 3 Jan 2026 22:23:49 +0500
Subject: [PATCH 3/6] Refactor check_pangram.py to remove duplicate import

Removed duplicate import of doctest and added a newline at the end of the file.
---
 strings/check_pangram.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/strings/check_pangram.py b/strings/check_pangram.py
index ca5136c0f92a..1c37eeec8409 100644
--- a/strings/check_pangram.py
+++ b/strings/check_pangram.py
@@ -1,3 +1,7 @@
+import doctest
+
+
+
 def check_pangram(input_str: str) -> bool:
     """
     Check if a string is a pangram (contains every letter of the alphabet).
@@ -12,6 +16,5 @@ def check_pangram(input_str: str) -> bool:
 
 
 if __name__ == "__main__":
-    import doctest
-
     doctest.testmod()
+    

From deab96b912319a721ba34ebac35c6aee0e4b66de Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Sat, 3 Jan 2026 17:24:14 +0000
Subject: [PATCH 4/6] [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci
---
 strings/check_pangram.py | 2 --
 1 file changed, 2 deletions(-)

diff --git a/strings/check_pangram.py b/strings/check_pangram.py
index 1c37eeec8409..d84b51a25146 100644
--- a/strings/check_pangram.py
+++ b/strings/check_pangram.py
@@ -1,7 +1,6 @@
 import doctest
 
 
-
 def check_pangram(input_str: str) -> bool:
     """
     Check if a string is a pangram (contains every letter of the alphabet).
@@ -17,4 +16,3 @@ def check_pangram(input_str: str) -> bool:
 
 if __name__ == "__main__":
     doctest.testmod()
-    

From dd1eb2752dbe838a8c6feaea13525ee860bfd738 Mon Sep 17 00:00:00 2001
From: Farhan Ahmad <fa6768243@gmail.com>
Date: Sat, 3 Jan 2026 22:27:19 +0500
Subject: [PATCH 5/6] Refactor pangram check to use set comparison

---
 strings/check_pangram.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/strings/check_pangram.py b/strings/check_pangram.py
index d84b51a25146..48aceae3ec17 100644
--- a/strings/check_pangram.py
+++ b/strings/check_pangram.py
@@ -11,7 +11,7 @@ def check_pangram(input_str: str) -> bool:
     >>> check_pangram("")
     False
     """
-    return len(set(c for c in input_str.lower() if c.isalpha())) == 26
+    return {c for c in input_str.lower() if c.isalpha()} == set("abcdefghijklmnopqrstuvwxyz")
 
 
 if __name__ == "__main__":

From f74dcbe6102ea881966a08cf275aad03bb765ffc Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Sat, 3 Jan 2026 17:27:38 +0000
Subject: [PATCH 6/6] [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci
---
 strings/check_pangram.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/strings/check_pangram.py b/strings/check_pangram.py
index 48aceae3ec17..a351fd211047 100644
--- a/strings/check_pangram.py
+++ b/strings/check_pangram.py
@@ -11,7 +11,9 @@ def check_pangram(input_str: str) -> bool:
     >>> check_pangram("")
     False
     """
-    return {c for c in input_str.lower() if c.isalpha()} == set("abcdefghijklmnopqrstuvwxyz")
+    return {c for c in input_str.lower() if c.isalpha()} == set(
+        "abcdefghijklmnopqrstuvwxyz"
+    )
 
 
 if __name__ == "__main__":