Pandas Series और DataFrame

Pandas Series और DataFrame क्या है?

Pandas Series और DataFrame ka matlab hai: Pandas provides Series and DataFrame for handling tabular data like Excel sheets and CSV files. Simple words me, ye topic practical Python programs likhne me direct use hota hai.

Is topic ko sirf definition ke liye nahi, balki reading CSV/Excel data jaise real examples ke liye practice karein.

यह क्यों सीखना जरूरी है?

• Ye reading CSV/Excel data me kaam aata hai.
• Ye handling result tables se bhi connected hai.
• Isse aap code ka output aur errors better samajh paate hain.

Important Terms

Syntax / Basic Pattern

Basic idea: pehle data तैयार करें, phir Python logic apply करें, aur finally result display करें.

import pandas as pd
df = pd.DataFrame({
    "Student": ["Aarav", "Riya", "Kabir"],
    "Marks": [82, 94, 76]
})
print(df)
print("Average:", df["Marks"].mean())

Complete Example Program

import pandas as pd

df = pd.DataFrame({
    "Student": ["Aarav", "Riya", "Kabir"],
    "Marks": [82, 94, 76]
})

print(df)
print("Average:", df["Marks"].mean())

Expected Output

Program Explanation

• import pandas as pd imports ready-made features from a module/library.
• df = pd.DataFrame({ stores a value in df.
• "Student": ["Aarav", "Riya", "Kabir"], performs the next step of the program logic.
• "Marks": [82, 94, 76] performs the next step of the program logic.
• }) performs the next step of the program logic.
• print(df) displays information or calculated result on the screen.
• print("Average:", df["Marks"].mean()) displays information or calculated result on the screen.

Practical Uses

• Reading csv/excel data.
• Handling result tables.
• Building reports.

Common Mistakes

• Analysing data before checking missing values, duplicates and data types.
• Changing original data without keeping a clean copy.
• Creating charts without title, labels or explanation.

Practice Tasks

1. Program ko pandas-series-dataframe.py file me type karke run karein.
2. Values change karke output compare karein.
3. reading CSV/Excel data par ek छोटा example banayen.
4. Logic ko apne words me 5 lines me likhein.

सारांश

Pandas Series and DataFrame ko tab complete maanenge jab aap iska meaning, example, output aur practical use clearly explain kar saken.