# 复杂操作(Apply) start = time.time() pdf['price_category'] = pdf['price'].apply(lambda x: 1 if x > 50 else 0) pandas_apply_time = time.time() - start start = time.time() gdf['price_category'] = gdf['price'].apply(lambda x: 1 if x > 50 else 0) cudf_apply_time = ...
# 复杂操作(Apply) start = time.time() pdf['price_category'] = pdf['price'].apply(lambda x: 1 if x > 50 else 0) pandas_apply_time = time.time() - start start = time.time() gdf['price_category'] = gdf['price'].apply(lambda x: 1 if x > 50 else 0) cudf_apply_time = ...
ALIGN_CLOSING_BRACKET_WITH_VISUAL_INDENT 右括号在一个缩进的位置对齐 ALLOW_MULTILINE_LAMBDAS 允许lambda表达式分多行书写 ALLOW_MULTILINE_DICTIONARY_KEYS 允许字典键值对分多行书写 示例: BLANK_LINE_BEFORE_NESTED_CLASS_OR_DEF 如果一个def或者class嵌套在另一个def或class中,那么就在前者之前插入一个空白行。
Python puts two annoying restrictions on lambda expressions. First, lambdas can only contain anexpression, notstatements. Second, lambdas can’t be serialized to disk. This blog shows how we can work around these restrictions and unleash the full power of lambdas. ...
apply(lambda x: pd.factorize(x)[0]) corrDf .head() # In[18]: # 构造相关性矩阵 corr = corrDf.corr() corr # In[19]: # 使用热地图显示相关系数 ''' heatmap 使用热地图展示系数矩阵情况 linewidths 热力图矩阵之间的间隔大小 annot 设定是否显示每个色块的系数值 ''' plt.figure(figsize=(20...
PEP 8: expected 2 blank lines,found 0 解决方法:需要两条空白行,添加两个空白行即可 PEP 8: function name should be lowercase 解决方法:函数名改成小写即可 PEP 8: missing whitespace aroundoperator 解决方法:操作符(’=’、’>’、’<'等)前后缺少空格,加上即可 ...
Python | 掌握 Lambda 函数,四不要 https://mp.weixin.qq.com/s/tWibBZGcX4PtEKo0a1bvzQ https://github.com/xitu/gold-miner/blob/master/article/2020/master-python-lambda-functions-with-these-4-donts.md 1. 不要返回任何值 2. 不要忘记更好的选择 3. 不要将它赋值给变量 4. 不要忘记列表推导...
In fact, you've already seen the use of anonymous functions in previous section when creating an object literal ('onmouseover' and 'onmouseout' assignments). This is similar to Python's lambda function, except that the syntax isn't awkward like lambda, and the function isn't limited to one...
Episode 180: Studying Python Software Architecture & Creating Lambda Expressions Nov 10, 2023 48m Have you moved through the fundamentals of Python, and are you now considering building a more extensive project or complete application? Where can you study the architecture of existing Python projects...
from keras.layers import Input, Lambda from keras.models import Model from keras.callbacks import TensorBoard, ModelCheckpoint, EarlyStopping from yolo3.model import preprocess_true_boxes, yolo_body, tiny_yolo_body, yolo_loss from yolo3.utils import get_random_data ...