Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchWindows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallPython’s built-in zip() pairs items from iterables by position and returns an iterator of tuples. By default, it stops when the shortest input runs out; use strict=True to catch unequal lengths or itertools.zip_longest() to pad shorter inputs.
How Python’s zip() works
zip(*iterables, strict=False) takes one or more iterables and yields tuples containing items at matching positions: the first tuple contains the first item from each input, the second contains the second, and so on. The official Python 3.14.7 built-in functions reference describes this behavior.
zip() is lazy: it produces values as you consume the returned iterator, rather than building all the tuples immediately. A loop or a call to list() consumes it.
names = ["Ada", "Linus", "Grace"]
roles = ["mathematician", "systems programmer", "computer scientist"]
for name, role in zip(names, roles):
print(name, role)Each loop iteration receives a two-item tuple, which Python unpacks into name and role.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Zero or one input
Calling zip() with no arguments returns an empty iterator. With one iterable, it yields one-item tuples, such as (1,), not bare values.
What happens when input lengths differ?
By default, iteration ends as soon as the shortest input is exhausted. Any remaining items in longer inputs are ignored. For example:
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
list(zip([1, 2, 3], ["a", "b"]))
# [(1, 'a'), (2, 'b')]This is useful when the unmatched tail should not be processed. If the iterables are supposed to have equal lengths, though, default zip() can conceal a data mismatch.
Choose between truncating, checking, and padding
| Need | Use | Behavior |
|---|---|---|
| Pair items by position and ignore any leftover tail | zip(a, b) |
Stops at the shortest input. |
| Require equal lengths | zip(a, b, strict=True) |
Raises ValueError if one input runs out before another. |
| Keep all items and fill shorter inputs | itertools.zip_longest(a, b, fillvalue=...) |
Continues until the longest input is exhausted. |
Use strict=True to detect a mismatch
Set strict=True when a length difference indicates a bug or invalid data. If lengths match, the resulting tuples are the same as with ordinary zip(). If they do not, consuming the iterator raises ValueError.
Quick wins for a faster PC:
Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
list(zip([1, 2, 3], ["a", "b"], strict=True))
# ValueError: zip() argument 2 is shorter than argument 1The strict parameter was added in Python 3.10. It is not available in older Python versions; the Python 3.10 release notes document the addition.
Use zip_longest() to pad
If you want to retain every item from the longer inputs, import zip_longest() from itertools. Its default padding value is None; pass fillvalue to choose a different value.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
from itertools import zip_longest
list(zip_longest([1, 2, 3], ["a", "b"], fillvalue="?"))
# [(1, 'a'), (2, 'b'), (3, '?')]Transpose or unzip paired data
zip() can turn rows into columns. The unpacking operator * passes each row as a separate input iterable:
rows = [(1, "a"), (2, "b")]
columns = list(zip(*rows))
# [(1, 2), ('a', 'b')]Similarly, if you already have paired data, unpacking the zipped iterator separates the positions into iterables:
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
pairs = [(1, "a"), (2, "b")]
numbers, letters = zip(*pairs)
# numbers == (1, 2); letters == ('a', 'b')Split an iterable into fixed-size chunks
A documented zip() idiom uses the same iterator repeatedly to consume successive groups of n items. With strict=True, the final group must be complete or iteration raises ValueError.
data = "ABCDEFG"
n = 3
chunks = list(zip(*[iter(data)] * n, strict=True))
# ValueError: the final chunk contains only one itemHere each repeated reference points to the same iterator, so each output tuple consumes the next n items from that one iterator. Use this form only when an incomplete final chunk should be an error. The built-in functions reference also specifies that iterable arguments are evaluated from left to right.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
