From dc6b906a182e8e6a5745de9b0a178b462dc62d37 Mon Sep 17 00:00:00 2001
From: Kaaviya Varrshini <balasuks@mail.uc.edu>
Date: Sat, 14 Jun 2025 19:52:49 -0400
Subject: [PATCH] Done Pandas1

---
 Problem1_2DList.py          | 15 +++++++++++++++
 Problem2_BigCountry.py      |  5 +++++
 Problem3_Recyclable.py      |  5 +++++
 Problem4_CustomerNoOrder.py | 15 +++++++++++++++
 4 files changed, 40 insertions(+)
 create mode 100644 Problem1_2DList.py
 create mode 100644 Problem2_BigCountry.py
 create mode 100644 Problem3_Recyclable.py
 create mode 100644 Problem4_CustomerNoOrder.py

diff --git a/Problem1_2DList.py b/Problem1_2DList.py
new file mode 100644
index 0000000..27018d0
--- /dev/null
+++ b/Problem1_2DList.py
@@ -0,0 +1,15 @@
+import pandas as pd
+
+# Two-dimensional list
+data = [['Geek1', 26, 'Scientist'],
+        ['Geek2', 31, 'Researcher'],
+        ['Geek3', 24, 'Engineer']]
+
+# Column names
+columns = ['Name', 'Age', 'Occupation']
+
+# Creating DataFrame using pd.DataFrame.from_dict()
+df = pd.DataFrame.from_dict(dict(zip(columns, zip(*data))))
+
+# Displaying the DataFrame
+print(df)
\ No newline at end of file
diff --git a/Problem2_BigCountry.py b/Problem2_BigCountry.py
new file mode 100644
index 0000000..67b9411
--- /dev/null
+++ b/Problem2_BigCountry.py
@@ -0,0 +1,5 @@
+import pandas as pd
+
+def big_countries(world: pd.DataFrame) -> pd.DataFrame:
+    df=world[(world['area']>=3000000) | (world['population']>=25000000)]
+    return pd.DataFrame(df[['name','population','area']])
\ No newline at end of file
diff --git a/Problem3_Recyclable.py b/Problem3_Recyclable.py
new file mode 100644
index 0000000..60cd155
--- /dev/null
+++ b/Problem3_Recyclable.py
@@ -0,0 +1,5 @@
+import pandas as pd
+
+def find_products(products: pd.DataFrame) -> pd.DataFrame:
+    df=products[(products['low_fats']=='Y') & (products['recyclable']=='Y')]
+    return pd.DataFrame(df[['product_id']])
\ No newline at end of file
diff --git a/Problem4_CustomerNoOrder.py b/Problem4_CustomerNoOrder.py
new file mode 100644
index 0000000..c24ce5d
--- /dev/null
+++ b/Problem4_CustomerNoOrder.py
@@ -0,0 +1,15 @@
+import pandas as pd
+
+#Soln 1: Using Merge
+def find_customers(customers: pd.DataFrame, orders: pd.DataFrame) -> pd.DataFrame:
+    df=customers.merge(orders,
+                left_on ='id',
+                right_on='customerId',
+                how='left')
+    df=df[df['id_y'].isnull()]
+    print(df[['name']])
+    return pd.DataFrame(df[['name']]).rename(columns={'name':'Customers'})
+
+#Soln 2: Using isin()
+    df=customers[~customers['id'].isin(orders['customerId'])]
+    return pd.DataFrame(df[['name']]).rename(columns={'name':'Customers'})
\ No newline at end of file