Python Cannot Import Data using Pandas

Question

So, I tried to work through the following machine learning tutorial:

http://machinelearningmastery.com/machine-learning-in-python-step-by-step/

This is my (mac) development environment:

Python 2.7.10 
scipy: 0.13.0b1
numpy: 1.8.0rc1
matplotlib: 1.3.1
pandas: 0.20.2
sklearn: 0.18.1

When I try to run a script, to load the data from a URL containing the CSV data, I get the following error:

Traceback (most recent call last):
  File "load_data.py", line 4, in <module>
    dataset = pandas.read_csv(url, names=names)
NameError: name 'pandas' is not defined

Here's the script:

# Load dataset
url = "https://archive.ics.uci.edu/ml/machine-learning-databases/iris/iris.data"
names = ['sepal-length', 'sepal-width', 'petal-length', 'petal-width', 'class']
dataset = pandas.read_csv(url, names=names)

Comments

I have the  similar error. And how did you fix it? Thank you very much!

---

Hi. I had forgotten to import pandas library. I imported the library before my code and it worked fine:

import pandas

Answer 1

So< if your error says:

    dataset = pandas.read_csv(url, names=names)
NameError: name 'pandas' is not defined

It probably means you're trying to use pandas.read_csv() without importing Pandas first.When you want to use an external library, you have to import it. if it's not installed on your machine, you may have to install it first too. assuming pandas is installed on your machine, this code will work:

import pandas
url = "https://archive.ics.uci.edu/ml/machine-learning-databases/iris/iris.data"
names = ['sepal-length', 'sepal-width', 'petal-length', 'petal-width', 'class']
dataset = pandas.read_csv(url, names=names)

output:

dataset.head(3)

   sepal-length  sepal-width  petal-length  petal-width        class
0           5.1          3.5           1.4          0.2  Iris-setosa
1           4.9          3.0           1.4          0.2  Iris-setosa
2           4.7          3.2           1.3          0.2  Iris-setosa

Comments

ModuleNotFoundError                       Traceback (most recent call last)
<ipython-input-2-da7c156ccdfe> in <module>
----> 1 import pandas
      2 url = "https://archive.ics.uci.edu/ml/machine-learning-databases/iris/iris.data"
      3 names = ['sepal-length', 'sepal-width', 'petal-length', 'petal-width', 'class']
      4 dataset = pandas.read_csv(url, names=names)

ModuleNotFoundError: No module named 'pandas'

---

You are trying to import the pandas module but it is not installed on your system. To install pandas run the below command in the terminal:

pip install pandas