想问下处理数据集不平衡问题的代码怎么写
应该是我的数据集不平衡，用代码要怎么处理，处理之后我想用随机森林建模，所以想知道在模型前面怎么加代码来处理数据集的不平衡问题
import pandas as pd
from sklearn.model_selection import train_test_split
from sklearn.ensemble import RandomForestClassifier
import numpy as np
from sklearn.metrics import accuracy_score
from sklearn.metrics import confusion_matrix
url=r"C:\Users\zmj佳佳佳\Desktop\测试.csv"
df = pd.read_csv(url, header=None, low_memory=False)
df.columns = ["grade", "dti", "delinq_2yrs", "earliest_cr_line", "fico_range_low", "inq_last_6mths",
"mths_since_last_delinq", "pub_rec", "revol_bal", "revol_util", "mths_since_last_major_derog",
"tot_cur_bal", "open_acc_6m", "open_il_12m", "open_il_24m", "mths_since_rcnt_il", "open_rv_12m",
"open_rv_24m", "max_bal_bc", "all_util", "inq_last_12m", "acc_open_past_24mths", "avg_cur_bal",
"bc_open_to_buy", "mo_sin_old_il_acct", "mo_sin_old_rev_tl_op", "mo_sin_rcnt_rev_tl_op", "mo_sin_rcnt_tl",
"mort_acc", "mths_since_recent_bc_dlq", "mths_since_recent_inq", "mths_since_recent_revol_delinq",
"num_accts_ever_120_pd", "num_actv_bc_tl", "num_actv_rev_tl", "num_bc_sats", "num_bc_tl",
"num_rev_accts", "num_rev_tl_bal_gt_0", "num_tl_90g_dpd_24m", "num_tl_op_past_12m", "pct_tl_nvr_dlq",
"pub_rec_bankruptcies"]
df.info()
# 将数据集分为训练集和测试集
x, y = df.iloc[:, 1:].values, df.iloc[:, 0].values
x_train, x_test, y_train, y_test = train_test_split(x, y, test_size=0.3, random_state=0)
feat_labels = df.columns
forest = RandomForestClassifier(random_state=0,n_jobs=-1, class_weight="balanced")
forest.fit(x_train, y_train)
print("准确率：", forest.score(x_train, y_train))
predict_results=forest.predict(x_test)
print(accuracy_score(predict_results, y_test))
print(confusion_matrix(predict_results, y_test))
因为我得模型准确率特别低，应该是数据集不平衡，我的目标变量如下：分为7类，这应该是不平衡才导致我得随机森林模型准确率只有40%吧
次数
有效 1 35494
2 30911
3 24827
4 13356
5 2962
6 23
7 14
总計 107587
页:
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