我是Python 3和编程的新手，所以我看了其他人的代码，只是为了开始粘贴一个例子到Jupyter。但在一开始，我得到一个错误"ModuleNotFoundError：没有名为'xgBoop'的模块"为什么这不工作？

import pandas            as pd
import numpy             as np
import re
import sklearn
import xgboost           as xgb // error
import seaborn           as sns
import matplotlib.pyplot as plt

%matplotlib inline

import plotly.offline    as py
py.init_notebook_mode(connected=True)
import plotly.graph_objs as go
import plotly.tools      as tls

import warnings
warnings.filterwarnings('ignore')

# Going to use these 5 base models for the stacking
from sklearn.ensemble         import (RandomForestClassifier, AdaBoostClassifier, GradientBoostingClassifier, ExtraTreesClassifier)
from sklearn.svm              import SVC
from sklearn.cross_validation import KFold