read_csv( 'large.csv', chunksize=chunksize, dtype=dtype_map ) # # 然后每个chunk进行一些压缩内存的操作,比如全都转成sparse类型 # string类型比如,学历,可以转化成sparse的category变量,可以省很多内存 sdf = pd.concat( chunk.to_sparse(fill_value=0.0) for chunk in chunks ) #很稀疏有可能可以装的下...
# 启动本地集群,这里使用LocalCluster,也可以连接到远程集群 cluster=LocalCluster()client=Client(cluster)# 读取CSV文件,blocksize参数指定每个数据块的大小 df=dd.read_csv('large_user_behavior.csv',blocksize='100MB')# 查看数据的前5行print(df.head())# 计算每个用户的平均行为时长 df['behavior_duratio...
both x & y axis limits are a bit large and can be narrowed down, the title is not exactly what we may like, etc.). We will now develop a more personalized plot for all the 12 months as follows:
Multiple lines can be commented by using triple quote at the start and at the end of the comment. Whatever is inside a commented block of code is ignored by the Python interpreter. Later we will discuss some standard formats for comments at the beginning of a function. For now we will ...
Remember: “suite” is Python-speak for “block.” Adding an argument is straightforward: you simply insert the argument’s name between the parentheses on thedefline. This argument name then becomes a variable in the function’s suite. This is an easy edit. ...
Typically, this allows a programmer to write a block of code to perform a single, related action. While Python provides many built-in functions, a programmer can create user-defined functions. The keyword def() begins a function. The programmer can place any variables inside the parenthesis. ...
{% extends "base.html" %} {% block title %}Graph API{% endblock %} {% block content %}<ahref="javascript:window.history.go(-1)">Back</a><!-- Displayed on top of a potentially large JSON response, so it will remain visible --><h1>Graph API Call Result</h1><pre>{{ result...
To be consistent with surrounding code that also breaks it (maybe for historic reasons) -- although this is also an opportunity to clean up someone else's mess (in true XP style). Because the code in question predates the introduction of the guideline and there is no other reason to be...
markdown_replace_repos.sh - replaces the repos block of a given markdown file. Used to keep my GitHub repos Other Repos sections updated mdl_list_indentations.sh- runs Markdownlint mdl command and prefixes the spaces count to each offending line of MD005 (inconsistent list indentations). ...
Here’s the code: Python decorators.py 1import functools 2import time 3 4# ... 5 6def timer(func): 7 """Print the runtime of the decorated function""" 8 @functools.wraps(func) 9 def wrapper_timer(*args, **kwargs): 10 start_time = time.perf_counter() 11 value = func(*...