我是Python和TensorFlow的新手。我最近开始理解和执行TensorFlow示例,并遇到了这个问题:https://www.tensorflow.org/versions/r0.10/tutorials/wide_and_deep/index.html
我遇到了一个错误,TypeError: argument of type 'float' is not iterable,我认为问题出现在以下代码行:
df_train[LABEL_COLUMN] = (df_train['income_bracket'].apply(lambda x: '>50K' in x)).astype(int)
(income_bracket 是人口普查数据集的标签列,其中“>50K”是可能的标签值之一,另一个标签是“=<50K”。数据集被读入 df_train。文档中提供的解释是:“由于任务是二元分类问题,我们将构建一个名为‘label’的标签列,其值为1如果收入超过50K,否则为0。”)
如果有人能够向我解释发生了什么以及我应该如何解决它,那就太好了。我尝试使用 Python2.7 和 Python3.4,我不认为问题出在语言版本上。此外,如果有人熟悉针对 TensorFlow 和 pandas 新手的优秀教程,请分享链接。
完整程序:
import pandas as pd
import urllib
import tempfile
import tensorflow as tf
gender = tf.contrib.layers.sparse_column_with_keys(column_name="gender", keys=["female", "male"])
race = tf.contrib.layers.sparse_column_with_keys(column_name="race", keys=["Amer-Indian-Eskimo", "Asian-Pac-Islander", "Black", "Other", "White"])
education = tf.contrib.layers.sparse_column_with_hash_bucket("education", hash_bucket_size=1000)
marital_status = tf.contrib.layers.sparse_column_with_hash_bucket("marital_status", hash_bucket_size=100)
relationship = tf.contrib.layers.sparse_column_with_hash_bucket("relationship", hash_bucket_size=100)
workclass = tf.contrib.layers.sparse_column_with_hash_bucket("workclass", hash_bucket_size=100)
occupation = tf.contrib.layers.sparse_column_with_hash_bucket("occupation", hash_bucket_size=1000)
native_country = tf.contrib.layers.sparse_column_with_hash_bucket("native_country", hash_bucket_size=1000)
age = tf.contrib.layers.real_valued_column("age")
age_buckets = tf.contrib.layers.bucketized_column(age, boundaries=[18, 25, 30, 35, 40, 45, 50, 55, 60, 65])
education_num = tf.contrib.layers.real_valued_column("education_num")
capital_gain = tf.contrib.layers.real_valued_column("capital_gain")
capital_loss = tf.contrib.layers.real_valued_column("capital_loss")
hours_per_week = tf.contrib.layers.real_valued_column("hours_per_week")
wide_columns = [gender, native_country, education, occupation, workclass, marital_status, relationship, age_buckets, tf.contrib.layers.crossed_column([education, occupation], hash_bucket_size=int(1e4)), tf.contrib.layers.crossed_column([native_country, occupation], hash_bucket_size=int(1e4)), tf.contrib.layers.crossed_column([age_buckets, race, occupation], hash_bucket_size=int(1e6))]
deep_columns = [
tf.contrib.layers.embedding_column(workclass, dimension=8),
tf.contrib.layers.embedding_column(education, dimension=8),
tf.contrib.layers.embedding_column(marital_status, dimension=8),
tf.contrib.layers.embedding_column(gender, dimension=8),
tf.contrib.layers.embedding_column(relationship, dimension=8),
tf.contrib.layers.embedding_column(race, dimension=8),
tf.contrib.layers.embedding_column(native_country, dimension=8),
tf.contrib.layers.embedding_column(occupation, dimension=8),
age, education_num, capital_gain, capital_loss, hours_per_week]
model_dir = tempfile.mkdtemp()
m = tf.contrib.learn.DNNLinearCombinedClassifier(
model_dir=model_dir,
linear_feature_columns=wide_columns,
dnn_feature_columns=deep_columns,
dnn_hidden_units=[100, 50])
COLUMNS = ["age", "workclass", "fnlwgt", "education", "education_num",
"marital_status", "occupation", "relationship", "race", "gender",
"capital_gain", "capital_loss", "hours_per_week", "native_country", "income_bracket"]
LABEL_COLUMN = 'label'
CATEGORICAL_COLUMNS = ["workclass", "education", "marital_status", "occupation", "relationship", "race", "gender", "native_country"]
CONTINUOUS_COLUMNS = ["age", "education_num", "capital_gain", "capital_loss", "hours_per_week"]
train_file = tempfile.NamedTemporaryFile()
test_file = tempfile.NamedTemporaryFile()
urllib.urlretrieve("https://archive.ics.uci.edu/ml/machine-learning-databases/adult/adult.data", train_file.name)
urllib.urlretrieve("https://archive.ics.uci.edu/ml/machine-learning-databases/adult/adult.test", test_file.name)
df_train = pd.read_csv(train_file, names=COLUMNS, skipinitialspace=True)
df_test = pd.read_csv(test_file, names=COLUMNS, skipinitialspace=True, skiprows=1)
df_train[LABEL_COLUMN] = (df_train['income_bracket'].apply(lambda x: '>50K' in x)).astype(int)
df_test[LABEL_COLUMN] = (df_test['income_bracket'].apply(lambda x: '>50K' in x)).astype(int)
def input_fn(df):
continuous_cols = {k: tf.constant(df[k].values)
for k in CONTINUOUS_COLUMNS}
categorical_cols = {k: tf.SparseTensor(
indices=[[i, 0] for i in range(df[k].size)],
values=df[k].values,
shape=[df[k].size, 1])
for k in CATEGORICAL_COLUMNS}
feature_cols = dict(continuous_cols.items() + categorical_cols.items())
label = tf.constant(df[LABEL_COLUMN].values)
return feature_cols, label
def train_input_fn():
return input_fn(df_train)
def eval_input_fn():
return input_fn(df_test)
m.fit(input_fn=train_input_fn, steps=200)
results = m.evaluate(input_fn=eval_input_fn, steps=1)
for key in sorted(results):
print("%s: %s" % (key, results[key]))
谢谢
PS:错误的完整堆栈跟踪信息
Traceback (most recent call last):
File "/home/jaspreet/PycharmProjects/TicTacTensorFlow/census.py", line 73, in <module>
df_train[LABEL_COLUMN] = (df_train['income_bracket'].apply(lambda x: '>50K' in x)).astype(int)
File "/usr/lib/python2.7/dist-packages/pandas/core/series.py", line 2023, in apply
mapped = lib.map_infer(values, f, convert=convert_dtype)
File "inference.pyx", line 920, in pandas.lib.map_infer (pandas/lib.c:44780)
File "/home/jaspreet/PycharmProjects/TicTacTensorFlow/census.py", line 73, in <lambda>
df_train[LABEL_COLUMN] = (df_train['income_bracket'].apply(lambda x: '>50K' in x)).astype(int)
TypeError: argument of type 'float' is not iterable
pandas
已经将你的 "income_bracket" 字段解析为了float
类型,而不是字符串。你能在你的代码中添加print df_train['income_bracket'].dtype
来查看结果并告诉我们吗? - mrryapply
不是你想要的方法。否则,二元分类返回的是 True/False,而不是 0 和 1。 - OneCricketeerfillna()
函数进行填充。 - ayhan